Translate displayMessage events via events_display keys (#2847)

If this PR fixes an issue, link it below. If not, delete these two
lines.
Resolves #1225

## Description:

Replace all raw displayMessage strings with events_display.* keys +
params and add the new English translations in resources/
  lang/en.json so EventsDisplay can translate them.

## 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:

aotumuri

---------

Co-authored-by: Ryan <7389646+ryanbarlow97@users.noreply.github.com>
Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

src/core/execution/SAMMissileExecution.ts

@@ -61,9 +61,11 @@ export class SAMMissileExecution implements Execution {
       );
       if (result === true) {
         this.mg.displayMessage(
-          `Missile intercepted ${this.target.type()}`,
+          "events_display.missile_intercepted",
           MessageType.SAM_HIT,
           this._owner.id(),
+          undefined,
+          { unit: this.target.type() },
         );
         this.active = false;
         this.target.delete(true, this._owner);