Update dependency (vite,vitest) (#1619)

## Changes
- vitest ^3 → ^4.1
- vitepress ^1 → ^2.0.0-alpha.17
- Add oxc-minify (peer required by vitepress@2 when rolldown-vite is in
use...)
- vite override ^6 → ^8, drop esbuild override (no longer a transitive
dep!)
- Split tsconfig into IDE base / ESM build / CJS build
- Drop `scripts/workaround-for-rollup.mjs` (no longer needed in vite v7+
!!)


Close #1617, #1579, #1435

Author: Yang-33