Add Alt + Click hotkey for sending emotes (#408)

## Description:

Allows the player to Alt + Click to send emotes to other players or
themself in order to ease communication.
Of course, the hotkey can be something different. Alt + Click is just a
suggestion.


![image](https://github.com/user-attachments/assets/9762c4f0-f62d-4c39-ba35-468ac3f5ddaa)

## Please complete the following:

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

kanekane0448

PS: The new emoji table looks really good!

---------

Co-authored-by: kanekane0448 <no@mail.pls>

src/client/InputHandler.ts

@@ -69,6 +69,12 @@ export class ShowBuildMenuEvent implements GameEvent {
     public readonly y: number,
   ) {}
 }
+export class ShowEmojiMenuEvent implements GameEvent {
+  constructor(
+    public readonly x: number,
+    public readonly y: number,
+  ) {}
+}
 
 export class AttackRatioEvent implements GameEvent {
   constructor(public readonly attackRatio: number) {}
@@ -292,6 +298,10 @@ export class InputHandler {
       this.eventBus.emit(new ShowBuildMenuEvent(event.clientX, event.clientY));
       return;
     }
+    if (event.altKey) {
+      this.eventBus.emit(new ShowEmojiMenuEvent(event.clientX, event.clientY));
+      return;
+    }
 
     const dist =
       Math.abs(event.x - this.lastPointerDownX) +