Clan System Part 1 (#3276)

## Description:

Properly split out clantags and usernames, a clantag should not be part
of a username.

<img width="285" height="286" alt="image"
src="https://github.com/user-attachments/assets/8ac56e82-b12c-4fc0-9774-e445252a6e61"
/>

https://api.openfront.dev/game/ojkqZFb2


<img width="296" height="596" alt="image"
src="https://github.com/user-attachments/assets/85152f80-c111-4f87-b85b-8516c9c6137b"
/>


https://api.openfront.dev/game/MF32BkVc


requires;
https://github.com/openfrontio/infra/pull/264

## 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

## Please put your Discord username so you can be contacted if a bug or
regression is found:

w.o.n

src/core/execution/MIRVExecution.ts

@@ -90,7 +90,7 @@ export class MirvExecution implements Execution {
       this.mg.displayIncomingUnit(
         this.nuke.id(),
         // TODO TranslateText
-        `⚠️⚠️⚠️ ${this.player.name()} - MIRV INBOUND ⚠️⚠️⚠️`,
+        `⚠️⚠️⚠️ ${this.player.displayName()} - MIRV INBOUND ⚠️⚠️⚠️`,
         MessageType.MIRV_INBOUND,
         this.targetPlayer.id(),
       );

src/core/execution/NukeExecution.ts

@@ -150,7 +150,7 @@ export class NukeExecution implements Execution {
           this.mg.displayIncomingUnit(
             this.nuke.id(),
             // TODO TranslateText
-            `${this.player.name()} - atom bomb inbound`,
+            `${this.player.displayName()} - atom bomb inbound`,
             MessageType.NUKE_INBOUND,
             target.id(),
           );
@@ -158,7 +158,7 @@ export class NukeExecution implements Execution {
           this.mg.displayIncomingUnit(
             this.nuke.id(),
             // TODO TranslateText
-            `${this.player.name()} - hydrogen bomb inbound`,
+            `${this.player.displayName()} - hydrogen bomb inbound`,
             MessageType.HYDROGEN_BOMB_INBOUND,
             target.id(),
           );