Added notifcation when a player wants to renew (#2391)

## Description:

Describe the PR.

Added a new chat message from the server once player wants to renew the
alliance, to the other player.

## Please complete the following:

- [x] I have added screenshots for all UI updates

<img width="572" height="256" alt="image"
src="https://github.com/user-attachments/assets/7feec21f-fff5-4544-8992-caf99c45913d"
/>

- [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:

DISCORD_USERNAME

notifxy (1379678982676676639)

src/core/execution/alliance/AllianceExtensionExecution.ts

@@ -36,6 +36,9 @@ export class AllianceExtensionExecution implements Execution {
       return;
     }
 
+    // Check if this is a new request (before adding it)
+    const wasOnlyOneAgreed = alliance.onlyOneAgreedToExtend();
+
     // Mark this player's intent to extend
     alliance.addExtensionRequest(this.from);
 
@@ -56,6 +59,16 @@ export class AllianceExtensionExecution implements Execution {
         undefined,
         { name: this.from.displayName() },
       );
+    } else if (alliance.onlyOneAgreedToExtend() && !wasOnlyOneAgreed) {
+      // Send message to the other player that someone wants to renew
+      // Only send if this is a new request (transition from "none" to "one")
+      mg.displayMessage(
+        "events_display.wants_to_renew_alliance",
+        MessageType.RENEW_ALLIANCE,
+        this.toID,
+        undefined,
+        { name: this.from.displayName() },
+      );
     }
   }