Private lobby toggle donation (#1752)

Resolve #1652

1. Add the ability to toggle **gold donations** and **troop donations**
for private lobbies
~2. Add relevant translations.~
3. Refactor `canDonate` to be specific to gold and troop donations
4. Add placeholders for singleplayer mode if this is to be extended to
support that too.
5. Add Tests for Donate logic
<img width="1643" height="1788" alt="image"
src="https://github.com/user-attachments/assets/82b93400-a1f0-45f0-8b2b-a7f78dc0c3e9"
/>

_Private Lobby_

![donatetroopsprivatelobby](https://github.com/user-attachments/assets/c6690bbc-958e-48a1-9cf1-e2b361dfb1b2)
_Testing Troop Send In Private Lobby_

![donatetroopsprivatelobby2](https://github.com/user-attachments/assets/698c7603-6b4b-4da7-91ab-7bdc38bb49a5)

_Troop Send Complete In Private Lobby_

![testtradepublicteams](https://github.com/user-attachments/assets/1010332c-3f38-4644-9218-46aa7141f578)
Confirming that public teams still works

- [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 have read and accepted the CLA agreement (only required once).
regression is found:

DISCORD_USERNAME: cool_clarky

---------

Co-authored-by: Scott Anderson <662325+scottanderson@users.noreply.github.com>
Co-authored-by: Drills Kibo <59177241+drillskibo@users.noreply.github.com>

src/server/GameManager.ts

@@ -39,6 +39,8 @@ export class GameManager {
       Date.now(),
       this.config,
       {
+        donateGold: false,
+        donateTroops: false,
         gameMap: GameMapType.World,
         gameType: GameType.Private,
         difficulty: Difficulty.Medium,

src/server/GameServer.ts

@@ -93,9 +93,15 @@ export class GameServer {
     if (gameConfig.infiniteGold !== undefined) {
       this.gameConfig.infiniteGold = gameConfig.infiniteGold;
     }
+    if (gameConfig.donateGold !== undefined) {
+      this.gameConfig.donateGold = gameConfig.donateGold;
+    }
     if (gameConfig.infiniteTroops !== undefined) {
       this.gameConfig.infiniteTroops = gameConfig.infiniteTroops;
     }
+    if (gameConfig.donateTroops !== undefined) {
+      this.gameConfig.donateTroops = gameConfig.donateTroops;
+    }
     if (gameConfig.instantBuild !== undefined) {
       this.gameConfig.instantBuild = gameConfig.instantBuild;
     }

src/server/MapPlaylist.ts

@@ -75,6 +75,8 @@ export class MapPlaylist {
 
     // Create the default public game config (from your GameManager)
     return {
+      donateGold: true,
+      donateTroops: true,
       gameMap: map,
       maxPlayers: config.lobbyMaxPlayers(map, mode, playerTeams),
       gameType: GameType.Public,