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/Censor.test.ts

@@ -1,5 +1,5 @@
 // Mocking the obscenity library to control its behavior in tests.
-jest.mock("obscenity", () => {
+vi.mock("obscenity", () => {
   return {
     RegExpMatcher: class {
       private dummy: string[] = ["foo", "bar", "leet", "code"];
@@ -26,7 +26,7 @@ jest.mock("obscenity", () => {
 });
 
 // Mocks the output of translation functions to return predictable values.
-jest.mock("../src/client/Utils", () => ({
+vi.mock("../src/client/Utils", () => ({
   translateText: (key: string, vars?: any) =>
     vars ? `${key}:${JSON.stringify(vars)}` : key,
 }));