Show game ID ingame 🪪 (#3674)

## Description:

Instead of begging youtubers to share their game id to be able to debug:

Display the current game ID in the top-right corner of the in-game
leaderboard panel (there was unused space)

<img width="391" height="326" alt="image"
src="https://github.com/user-attachments/assets/8b0aa7c2-fc8c-48e5-ae11-edd60fd40de9"
/>

## 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:

FloPinguin

src/client/graphics/layers/GameLeftSidebar.ts

@@ -133,6 +133,13 @@ export class GameLeftSidebar extends LitElement implements Layer {
               height="20"
             />
           </div>
+          ${this.isLeaderboardShow || this.isTeamLeaderboardShow
+            ? html`<span
+                class="ml-auto text-[10px] text-slate-500 select-all leading-none self-start"
+                title=${translateText("help_modal.game_id_tooltip")}
+                >${this.game?.gameID() ?? ""}</span
+              >`
+            : null}
           ${this.isTeamGame
             ? html`
                 <div