Rev: Update "Japan and Neighbors" map to "East Asia" (#1007)

**Closes Issue #1001.**

_Will require updates to translations for each language but English is
in place as are pointers to relevant map files and thumbnails._

## Description:
All assets and references to the Japan and Neighbors map have been
updated to reflect East Asia.

**New Behavior**
![East Asia
Map](https://github.com/user-attachments/assets/64192590-bbb7-4408-a99b-7455de295d2b)

**Old Behavior**
![Japan and Neighbors named
map](https://github.com/user-attachments/assets/ba44dd56-1470-4c74-a70d-bd7fd8f3c795)

Game test is functioning. Other languages will need to be updated for
their displayed text to align.

## Please complete the following:

- [x] I have added screenshots for all UI updates
- [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
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced
- [x] I understand that submitting code with bugs that could have been
caught through manual testing blocks releases and new features for all
contributors

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

ajaxburger
_My git name is included in my nickname on the server._

---------

Co-authored-by: evanpelle <evanpelle@gmail.com>

src/core/configuration/DefaultConfig.ts

@@ -53,7 +53,7 @@ const numPlayersConfig = {
   [GameMapType.Mena]: [60, 50, 30],
   [GameMapType.Mars]: [50, 40, 30],
   [GameMapType.Oceania]: [30, 20, 10],
-  [GameMapType.Japan]: [50, 40, 30],
+  [GameMapType.EastAsia]: [50, 40, 30],
   [GameMapType.FaroeIslands]: [50, 40, 30],
   [GameMapType.DeglaciatedAntarctica]: [50, 40, 30],
   [GameMapType.EuropeClassic]: [80, 30, 50],

src/core/game/Game.ts

@@ -70,7 +70,7 @@ export enum GameMapType {
   GatewayToTheAtlantic = "Gateway to the Atlantic",
   Australia = "Australia",
   Iceland = "Iceland",
-  Japan = "Japan",
+  EastAsia = "East Asia",
   BetweenTwoSeas = "Between Two Seas",
   FaroeIslands = "Faroe Islands",
   DeglaciatedAntarctica = "Deglaciated Antarctica",
@@ -97,7 +97,7 @@ export const mapCategories: Record<string, GameMapType[]> = {
     GameMapType.GatewayToTheAtlantic,
     GameMapType.BetweenTwoSeas,
     GameMapType.Iceland,
-    GameMapType.Japan,
+    GameMapType.EastAsia,
     GameMapType.Mena,
     GameMapType.Australia,
     GameMapType.FaroeIslands,

src/core/game/TerrainMapFileLoader.ts

@@ -39,7 +39,7 @@ const MAP_FILE_NAMES: Record<GameMapType, string> = {
   [GameMapType.GatewayToTheAtlantic]: "GatewayToTheAtlantic",
   [GameMapType.Australia]: "Australia",
   [GameMapType.Iceland]: "Iceland",
-  [GameMapType.Japan]: "Japan",
+  [GameMapType.EastAsia]: "EastAsia",
   [GameMapType.BetweenTwoSeas]: "BetweenTwoSeas",
   [GameMapType.FaroeIslands]: "FaroeIslands",
   [GameMapType.DeglaciatedAntarctica]: "DeglaciatedAntarctica",