test: replace mocha with vitest

Vitest runs tsc's output rather than the TypeScript sources. The injector
discovers dependencies by regex-parsing constructor source text (annotate()
in lib/common/helpers.ts), which only matches tsc's emit; esbuild's class
transform emits constructor(...args), so running the sources directly makes
every injectable fail to resolve.

Test changes required by the runner:

- before/after hooks renamed to beforeAll/afterAll
- 9 promise-chain tests using mocha's done callback converted to async/await
- 25 event-driven done callbacks adapted through withDone(), which wraps a
  callback-style body in the promise the runner expects
- the hand-written mocha global typings replaced with vitest/globals

Three failures were pre-existing rather than migration fallout, and are
fixed here because vitest surfaces them where mocha stayed quiet:

- test/options.ts disabled its whole suite with an early return, and
  getNSValue in project-data-service generates its cases from an array whose
  entries are all commented out; both are now explicit .skip, which is why
  the skipped count rises from 9 to 38
- project-name-service only passed because test/project-commands.ts assigns
  helpers.isInteractive = () => true in a beforeEach and never restores it,
  and mocha's shared module registry leaked that to every file running after
  it. Per-file isolation removes the leak, so ensureValidName takes its
  non-interactive path and never prompts; the test now pins interactivity
  explicitly through setIsInteractive()
- the callstack assertion in errors.ts matched "at next", a mocha runner
  frame, and now just requires a stack frame

Same 1513 passing, 22s rather than 31s. Drops istanbul, which nothing
referenced, and dev/tsc-to-mocha-watch.js, which required chalk - not a
declared dependency since it was removed in e562267.

Author: edusperoni

dev/tsc-to-mocha-watch.js

@@ -128,7 +128,7 @@ describe("analytics-service", () => {
 		service = null;
 	});
 
-	after(() => {
+	afterAll(() => {
 		setIsInteractive(null);
 	});
 
@@ -147,8 +147,8 @@ describe("analytics-service", () => {
 		});
 
 		it("returns false when analytics status is disabled", async () => {
-			baseTestScenario.exceptionsTracking = baseTestScenario.featureTracking =
-				false;
+			baseTestScenario.exceptionsTracking =
+				baseTestScenario.featureTracking = false;
 			const testInjector = createTestInjector(baseTestScenario);
 			service = testInjector.resolve<IAnalyticsService>("analyticsService");
 			const staticConfig: Config.IStaticConfig =
@@ -377,8 +377,8 @@ describe("analytics-service", () => {
 		});
 
 		it("does nothing when exception and feature tracking are already set", async () => {
-			baseTestScenario.featureTracking = baseTestScenario.exceptionsTracking =
-				true;
+			baseTestScenario.featureTracking =
+				baseTestScenario.exceptionsTracking = true;
 			const testInjector = createTestInjector(baseTestScenario);
 			service = testInjector.resolve<IAnalyticsService>("analyticsService");
 			await service.checkConsent();