Feat: Tournament Maps (#3483)

## Description:

Introduces 4 new private match maps for the OFM tournament in May.
Includes 2, 3, 4, and 8 player maps. Playtested, and include as many
default nations as the map expects players, named after compass points.
Give it a try at https://tourney-maps.openfront.dev/

<img width="1500" height="1500" alt="image"
src="https://github.com/user-attachments/assets/9138b636-5dd7-4118-82e2-50a5125a7963"
/>

The base images were created from scratch based on prototype designs,
and they were converted from vector versions I made. I haven't decided
on what the names should be for the maps themselves, so for now they're
just `Tourney Map 1`, `Tourney Map 2`, etc. Ideas welcome.


## 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

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

bijx

src/core/game/Game.ts

@@ -120,6 +120,10 @@ export enum GameMapType {
   Lisbon = "Lisbon",
   Manicouagan = "Manicouagan",
   Lemnos = "Lemnos",
+  Tourney1 = "Tourney 2 Teams",
+  Tourney2 = "Tourney 3 Teams",
+  Tourney3 = "Tourney 4 Teams",
+  Tourney4 = "Tourney 8 Teams",
   Passage = "Passage",
   Sierpinski = "Sierpinski",
   TheBox = "The Box",
@@ -210,6 +214,12 @@ export const mapCategories: Record<string, GameMapType[]> = {
     GameMapType.DidierFrance,
     GameMapType.Sierpinski,
   ],
+  tournament: [
+    GameMapType.Tourney1,
+    GameMapType.Tourney2,
+    GameMapType.Tourney3,
+    GameMapType.Tourney4,
+  ],
 };
 
 export enum GameType {