Show alliances on the PlayerPanel (#1053)

## Description:
Added a list of Alliances to the PlayerPanel. Displays `None` if player
has no Alliances

<img width="272" alt="Screenshot 2025-06-05 at 19 55 26"
src="https://github.com/user-attachments/assets/1378a56b-5033-45fa-b173-6b17054d40a3"
/>
<img width="318" alt="Screenshot 2025-06-05 at 19 54 41"
src="https://github.com/user-attachments/assets/4d931cef-67a0-4dc9-a02c-13b0cce46864"
/>
## 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:

maxion_

resources/lang/en.json

@@ -424,7 +424,9 @@
     "start_trade": "Start trading",
     "stop_trade": "Stop trading",
     "yes": "Yes",
-    "no": "No"
+    "no": "No",
+    "none": "None",
+    "alliances": "Alliances"
   },
   "error_modal": {
     "crashed": "Game crashed!",

src/client/graphics/layers/PlayerPanel.ts

@@ -329,6 +329,25 @@ export class PlayerPanel extends LitElement implements Layer {
                 </div>
               </div>
 
+              <!-- Alliances -->
+              <div class="flex flex-col gap-1">
+                <div class="text-white text-opacity-80 text-sm px-2">
+                  ${translateText("player_panel.alliances")}
+                  (${other.allies().length})
+                </div>
+                <div
+                  class="bg-opacity-50 bg-gray-700 rounded p-2 text-white max-w-72 max-h-20 overflow-y-auto"
+                  translate="no"
+                >
+                  ${other.allies().length > 0
+                    ? other
+                        .allies()
+                        .map((p) => p.name())
+                        .join(", ")
+                    : translateText("player_panel.none")}
+                </div>
+              </div>
+
               ${this.allianceExpiryText !== null
                 ? html`
                     <div class="flex flex-col gap-1">