Replace Jest + ts-jest with Vitest

- Remove jest, ts-jest, @types/jest; add vitest
- Move test config into vite.config.ts, delete jest.config.js
- Replace jest.setTimeout/jasmine blocks with per-test timeout args
- Replace JEST_WORKER_ID with VITEST_POOL_ID for Node-only tests
- Add test/vitest-globals.d.ts for global type definitions
- Update .npmignore, CHANGELOG.md

Author: vijayshiyani

.npmignore

@@ -12,7 +12,7 @@ coverage/
 .rts2*
 
 karma.conf.js
-jest.config.js
+vite.config.ts
 tsconfig.json
 tslint.json
 eslint.config.mjs

CHANGELOG.md

@@ -7,7 +7,8 @@
 - Replace bili/rollup build with dual CJS + ESM tsc output
 - Upgrade node-forge 0.10.0 → 1.3.x
 - Upgrade bson 4 → 7, yaml 1 → 2, buffer 5 → 6
-- Upgrade Jest 24 → 30, Prettier 2 → 3
+- Replace Jest + ts-jest with Vitest (native TypeScript support via Vite)
+- Upgrade Prettier 2 → 3
 - Replace TSLint (deprecated) with ESLint 9 flat config
-- Remove Karma browser test runner (deprecated since Apr 2023, no longer maintained; all crypto logic uses node-forge which is pure JS — Jest covers all code paths)
+- Remove Karma browser test runner (deprecated since Apr 2023, no longer maintained; all crypto logic uses node-forge which is pure JS — Vitest covers all code paths)
 - Update GitHub Actions to v4, Node 22