Refactor and add unit testing

[suhaotian]

The goals:

• Refactor code
• Export API SDK: Support ESM and CommonJS
• Export API SDK: Support generating Vue Query hooks (Currently, supports SWR and React Query)
  • Support generating multiple platform hooks at the same time
  • Add Solidjs and Svelte TanStack Query support
• Use script to extract API info from *.apiconf.ts (before using tsc to build JS from TS first then require, and it's slow)
• Unit testing
  • tsdk
  • tsdk-server-adapters
  • tsdk/fe-sdk-template
• Support valibot / zod/v4 / arktype with https://github.com/standard-schema/standard-schema
• Export API SDK supports running on Web Workers
• [ ] tsdk-server-adapters: more convenient setup API
• E2E testing
  • Different bundlers and frameworks: Vite / Webpack / Next.js / Remix (React Router)
  • Different adapters: Express / Fastify / Hono / Socket.io
  • Hooks tests: SWR / Vue Query / React Query / Solidjs / Svelte
• [ ] Export API SDK: OpenAPI documentation generated
• make unit tests and e2e tests make sense
• [ ] Experiment: switch nest-cli to vite keep nest-cli
• Better API SDK documentation
• Better documentation
• AI-friendly