Add SAM interception FX (#830)

## Description:
Add SAM interception animation:


https://github.com/user-attachments/assets/5bfae4f2-f040-41cb-8fba-790538091807

Previously an intercepted nuke detonated with the regular nuke
explosion, which was confusing.

## 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:

IngloriousTom

src/core/execution/SAMLauncherExecution.ts

@@ -180,7 +180,10 @@ export class SAMLauncherExecution implements Execution {
             this.sam.owner().id(),
           );
           // Delete warheads
-          mirvWarheadTargets.forEach((u) => u.delete());
+          mirvWarheadTargets.forEach((u) => {
+            u.setInterceptedBySam();
+            u.delete();
+          });
         } else if (target !== null) {
           target.setTargetedBySAM(true);
           this.mg.addExecution(

src/core/execution/SAMMissileExecution.ts

@@ -66,6 +66,7 @@ export class SAMMissileExecution implements Execution {
           this._owner.id(),
         );
         this.active = false;
+        this.target.setInterceptedBySam();
         this.target.delete(true, this._owner);
         this.SAMMissile.delete(false);
 

src/core/game/Game.ts

@@ -345,6 +345,8 @@ export interface Unit {
   targetUnit(): Unit | undefined;
   setTargetedBySAM(targeted: boolean): void;
   targetedBySAM(): boolean;
+  setInterceptedBySam(): void;
+  interceptedBySam(): boolean;
 
   // Health
   hasHealth(): boolean;

src/core/game/GameUpdates.ts

@@ -73,6 +73,7 @@ export interface UnitUpdate {
   pos: TileRef;
   lastPos: TileRef;
   isActive: boolean;
+  wasIntercepted: boolean;
   retreating: boolean;
   targetUnitId?: number; // Only for trade ships
   targetTile?: TileRef; // Only for nukes

src/core/game/GameView.ts

@@ -93,6 +93,9 @@ export class UnitView {
   isActive(): boolean {
     return this.data.isActive;
   }
+  wasInterceptedBySAM(): boolean {
+    return this.data.wasIntercepted;
+  }
   hasHealth(): boolean {
     return this.data.health !== undefined;
   }

src/core/game/UnitImpl.ts

@@ -21,6 +21,7 @@ export class UnitImpl implements Unit {
   private _lastTile: TileRef;
   private _retreating: boolean = false;
   private _targetedBySAM = false;
+  private _interceptedBySAM = false;
   private _lastSetSafeFromPirates: number; // Only for trade ships
   private _constructionType: UnitType | undefined;
   private _lastOwner: PlayerImpl | null = null;
@@ -85,6 +86,7 @@ export class UnitImpl implements Unit {
       ownerID: this._owner.smallID(),
       lastOwnerID: this._lastOwner?.smallID(),
       isActive: this._active,
+      wasIntercepted: this._interceptedBySAM,
       retreating: this._retreating,
       pos: this._tile,
       lastPos: this._lastTile,
@@ -304,6 +306,14 @@ export class UnitImpl implements Unit {
     return this._targetedBySAM;
   }
 
+  setInterceptedBySam(): void {
+    this._interceptedBySAM = true;
+  }
+
+  interceptedBySam(): boolean {
+    return this._interceptedBySAM;
+  }
+
   setSafeFromPirates(): void {
     this._lastSetSafeFromPirates = this.mg.ticks();
   }