build: migrate build system to Vite and test runner to Vitest & Remove depracated husky usage (#2703)

- Replace Webpack with Vite for faster client bundling and HMR.
- Migrate tests from Jest to Vitest and update configuration.
- Update Web Worker instantiation to standard ESM syntax.
- Implement Env utility in `src/core` for safe, hybrid environment
variable access (Vite vs Node).
- Refactor configuration loaders to remove direct `process.env`
dependencies in shared code.
- Update TypeScript environment definitions and project scripts for the
new toolchain.
- Remove the [depracated usage of the
husky](https://github.com/typicode/husky/releases/tag/v9.0.1).

## Description:

migrate build system to Vite and test runner to Vitest & Remove
depracated husky usage

## 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
- [ ] 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:

wraith4081

---------

Co-authored-by: evanpelle <evanpelle@gmail.com>

tests/core/executions/NukeExecution.test.ts

@@ -28,11 +28,11 @@ describe("NukeExecution", () => {
       ],
     );
 
-    (game.config() as TestConfig).nukeMagnitudes = jest.fn(() => ({
+    (game.config() as TestConfig).nukeMagnitudes = vi.fn(() => ({
       inner: 10,
       outer: 10,
     }));
-    (game.config() as TestConfig).nukeAllianceBreakThreshold = jest.fn(() => 5);
+    (game.config() as TestConfig).nukeAllianceBreakThreshold = vi.fn(() => 5);
 
     while (game.inSpawnPhase()) {
       game.executeNextTick();
@@ -51,14 +51,14 @@ describe("NukeExecution", () => {
     player.buildUnit(UnitType.MissileSilo, game.ref(1, 10), {});
     // Build a SAM out of range
     const sam = player.buildUnit(UnitType.SAMLauncher, game.ref(1, 11), {});
-    sam.touch = jest.fn();
+    sam.touch = vi.fn();
     // Build a Defense post out of range AND out of redraw range
     const defensePost = player.buildUnit(
       UnitType.DefensePost,
       game.ref(1, 27),
       {},
     );
-    defensePost.touch = jest.fn();
+    defensePost.touch = vi.fn();
     // Add a nuke execution targeting the city
     const nukeExec = new NukeExecution(
       UnitType.AtomBomb,