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/core/execution/DonateGoldExecution.ts

@@ -25,7 +25,7 @@ export class DonateGoldExecution implements Execution {
   tick(ticks: number): void {
     if (this.gold === null) throw new Error("not initialized");
     if (
-      this.sender.canDonate(this.recipient) &&
+      this.sender.canDonateGold(this.recipient) &&
       this.sender.donateGold(this.recipient, this.gold)
     ) {
       this.recipient.updateRelation(this.sender, 50);

src/core/execution/DonateTroopExecution.ts

@@ -28,7 +28,7 @@ export class DonateTroopsExecution implements Execution {
   tick(ticks: number): void {
     if (this.troops === null) throw new Error("not initialized");
     if (
-      this.sender.canDonate(this.recipient) &&
+      this.sender.canDonateTroops(this.recipient) &&
       this.sender.donateTroops(this.recipient, this.troops)
     ) {
       this.recipient.updateRelation(this.sender, 50);