Private lobby toggle donation (#1752)

## Description:
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

### Screenshots:
<img width="1643" height="1788" alt="image"
src="https://github.com/user-attachments/assets/82b93400-a1f0-45f0-8b2b-a7f78dc0c3e9"
/>

_Private Lobby_

### Smoke Tests


![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


## 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 have read and accepted the CLA agreement (only required once).

## Please put your Discord username so you can be contacted if a bug or
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

@@ -43,6 +43,8 @@ export class GameManager {
         difficulty: Difficulty.Medium,
         disableNPCs: false,
         disabledUnits: [],
+        donateGold: false,
+        donateTroops: false,
         gameMap: GameMapType.World,
         gameMode: GameMode.FFA,
         gameType: GameType.Private,

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

@@ -81,6 +81,8 @@ export class MapPlaylist {
       difficulty: Difficulty.Medium,
       disableNPCs: mode === GameMode.Team,
       disabledUnits: [],
+      donateGold: true,
+      donateTroops: true,
       gameMap: map,
       gameMode: mode,
       gameType: GameType.Public,