Generate a single MapInfo list; move SPECIAL_TEAM_MAPS and en.json map names into info.json (#4231)

**Add approved & assigned issue number here:**

N/A — maintainer follow-up to #4227.

## Description:

Follow-up to #4227, finishing the "info.json is the single source of
truth" refactor.

**Maps.gen.ts now generates one `MapInfo` interface and a `maps` list**
instead of parallel lookup records. `mapCategories`,
`mapTranslationKeys`, and `multiplayerFrequency` are gone — consumers
read the list directly (`map.categories`, `map.translationKey`,
`map.multiplayerFrequency`). MapPicker got simpler in the process: it
renders from `MapInfo` objects, so the reverse
`Object.entries(GameMapType)` lookup to recover the enum key is gone.
The featured-rank sort moved out of the Go codegen into the picker,
where the presentation concern belongs.

**`SPECIAL_TEAM_MAPS` moves into info.json** as an optional
`special_team_count` field (set on the same 17 maps with the same
values). MapPlaylist derives its map from the generated list;
`SPECIAL_TEAM_FORCE_CHANCE` and the frequency multiplier behavior are
unchanged.

**The en.json `map` section is now generated.** A new optional
`display_name` field in info.json (defaulting to `name`) is written to
`resources/lang/en.json` by the generator, preserving the section's
non-map UI keys (`map`, `featured`, `all`, `favorites`, `random`). The 8
maps whose English display name intentionally differs from the frozen
enum value (e.g. `MENA`, `Milky Way`, `Europe (Classic)`, `Baikal (Nuke
Wars)`) declare it via `display_name`, so no display text changes. The
section is emitted alphabetically; since #4232 already sorted en.json
and every value matches, regeneration is byte-identical and this PR has
no en.json diff. Other languages remain Crowdin-managed.

The generator also now validates `translation_key` is exactly
`map.<folder>` and `special_team_count >= 2`. MapConsistency tests
compare info.json directly against the generated list and the en.json
section, and fail with a "run `npm run gen-maps`" message on drift. No
behavior changes: enum values, playlist frequencies, special-team
counts, featured order, and display names are all byte-identical.

## Please complete the following:

- [x] I have added screenshots for all UI updates (no UI changes —
internal refactor, rendering output identical)
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory

## Please put your Discord username so you can be contacted if a bug or
regression is found:

evanpelle

🤖 Generated with [Claude Code](https://claude.com/claude-code)

---------

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

resources/maps/aegean/manifest.json

@@ -140,6 +140,7 @@
       "name": "Carpathos"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/archipelagosea/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["europe"],
+  "display_name": "Archipelago Sea",
   "id": "ArchipelagoSea",
   "map": {
     "height": 1508,

resources/maps/baikal/manifest.json

@@ -75,6 +75,7 @@
       "name": "Listvyanka"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/baikalnukewars/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["other"],
+  "display_name": "Baikal (Nuke Wars)",
   "id": "BaikalNukeWars",
   "map": {
     "height": 1564,

resources/maps/beringsea/manifest.json

@@ -140,6 +140,7 @@
       "name": "Magadan"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/beringstrait/manifest.json

@@ -30,6 +30,7 @@
       "name": "Russia"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/bosphorusstraits/manifest.json

@@ -130,6 +130,7 @@
       "name": "Esenyurt"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/britanniaclassic/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["europe"],
+  "display_name": "Britannia (Classic)",
   "id": "BritanniaClassic",
   "map": {
     "height": 1396,

resources/maps/choppingblock/manifest.json

@@ -323,6 +323,7 @@
       "name": "Keeko"
     }
   ],
+  "special_team_count": 4,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/conakry/manifest.json

@@ -120,6 +120,7 @@
       "name": "Dioumaya"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/didierfrance/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["other"],
+  "display_name": "Didier (France)",
   "id": "DidierFrance",
   "map": {
     "height": 2248,

resources/maps/europeclassic/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["europe"],
+  "display_name": "Europe (Classic)",
   "id": "EuropeClassic",
   "map": {
     "height": 1000,

resources/maps/falklandislands/manifest.json

@@ -80,6 +80,7 @@
       "name": "San Carlos"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/fourislands/manifest.json

@@ -40,6 +40,7 @@
       "name": "Myrkwind"
     }
   ],
+  "special_team_count": 4,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/gulfofstlawrence/manifest.json

@@ -150,6 +150,7 @@
       "name": "Yarmouth"
     }
   ],
+  "special_team_count": 3,
   "teamGameSpawnAreas": {
     "3": [
       {

resources/maps/juandefucastrait/manifest.json

@@ -322,6 +322,7 @@
       "name": "Arlington"
     }
   ],
+  "special_team_count": 3,
   "teamGameSpawnAreas": {
     "3": [
       {

resources/maps/luna/manifest.json

@@ -145,6 +145,7 @@
       "name": "ΜΟΝΟʟΙȚΗ"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/mena/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["asia", "africa"],
+  "display_name": "MENA",
   "id": "Mena",
   "map": {
     "height": 964,

resources/maps/milkyway/manifest.json

@@ -1,5 +1,6 @@
 {
   "categories": ["cosmic"],
+  "display_name": "Milky Way",
   "id": "MilkyWay",
   "map": {
     "height": 1500,

resources/maps/pluto/manifest.json

@@ -100,6 +100,7 @@
       "name": "Free Pluto State"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/southeastasia/manifest.json

@@ -157,6 +157,7 @@
     }
   ],
   "categories": ["asia"],
+  "display_name": "Southeast Asia",
   "id": "SoutheastAsia",
   "map": {
     "height": 1672,

resources/maps/straitofgibraltar/manifest.json

@@ -52,6 +52,7 @@
       "name": "Andalusia"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/straitofhormuz/manifest.json

@@ -125,6 +125,7 @@
       "name": "Bahrain"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/surrounded/manifest.json

@@ -60,6 +60,7 @@
       "name": "Rugged Islander"
     }
   ],
+  "special_team_count": 4,
   "teamGameSpawnAreas": {
     "2": [
       {

resources/maps/tradersdream/manifest.json

@@ -85,6 +85,7 @@
       "name": "Harborwick"
     }
   ],
+  "special_team_count": 2,
   "teamGameSpawnAreas": {
     "2": [
       {