chore: migrate toolchain to Vite+ (#664)

Migrates the JavaScript toolchain to [Vite+](https://viteplus.dev)
(`vp`) via `vp migrate`, unifying formatting, linting, testing, and git
hooks under a single CLI. The Rust/napi build (`@napi-rs/cli` +
`rolldown`) and the `lerna` publish flow are untouched.

## Changes

| File | Change |
|------|--------|
| `package.json` | `fmt`→`vp fmt && cargo fmt`, `lint`→`vp lint`,
`prepare`→`vp config`; drop
`oxfmt`/`oxlint`/`oxlint-tsgolint`/`husky`/`lint-staged` deps + the
`lint-staged` block; add `vite`/`vite-plus` (catalog) |
| `pnpm-workspace.yaml` | catalog `vite` (→
`@voidzero-dev/vite-plus-core@0.2.2`) and `vite-plus`, plus
`overrides`/`peerDependencyRules` so all `vite` resolves to Vite+ |
| `vite.config.ts` *(new)* | folds in `.oxlintrc.json` (`lint` block)
and `lint-staged` (`staged` block); adds the `prefer-vite-plus-imports`
rule |
| `.oxlintrc.json`, `.husky/pre-commit` | removed (folded into
`vite.config.ts` / replaced by `.vite-hooks/`) |
| `.vite-hooks/pre-commit` *(new)* | runs `vp staged`; `core.hooksPath`
→ `.vite-hooks/_` |
| `AGENTS.md` *(new)* | Vite+ agent instructions |
| `packages/integrate-vitest/*` | `test`→`vp test run`; `vitest` →
`vite-plus` / `vite-plus/test` imports rewritten (config + 4 specs) |

The tools themselves are still provided by the `vite-plus` package, so
`node_modules/.bin/{vp,oxfmt,oxlint}` remain available and CI (`pnpm
lint`, `node --run fmt`, `prepare: vp config`) resolves them the same
way the old node_modules binaries did.

## Verification

- `vp check` — 95 files formatted, 51 files lint + type-check clean, 0
errors
- `vp run test` — integrate-module (21), integrate-module-bundler (22,
incl. NestJS), integrate-vitest (9, via vitest 4.1.9 through
`vite-plus/test`)
- `node --run fmt` (autofix-CI command) — exit 0, no drift
- pre-commit hook (`vp staged`) exercised by this branch's commit

Author: Boshen

.husky/pre-commit

@@ -0,0 +1 @@
+vp staged

.oxlintrc.json

@@ -0,0 +1,16 @@
+<!--VITE PLUS START-->
+
+# Using Vite+, the Unified Toolchain for the Web
+
+This project is using Vite+, a unified toolchain built on top of Vite, Rolldown, Vitest, tsdown, Oxlint, Oxfmt, and Vite Task. Vite+ wraps runtime management, package management, and frontend tooling in a single global CLI called `vp`. Vite+ is distinct from Vite, and it invokes Vite through `vp dev` and `vp build`. Run `vp help` to print a list of commands and `vp <command> --help` for information about a specific command.
+
+Docs are local at `node_modules/vite-plus/docs` or online at https://viteplus.dev/guide/.
+
+## Review Checklist
+
+- [ ] Run `vp install` after pulling remote changes and before getting started.
+- [ ] Run `vp check` and `vp test` to format, lint, type check and test changes.
+- [ ] Check if there are `vite.config.ts` tasks or `package.json` scripts necessary for validation, run via `vp run <script>`.
+- [ ] If setup, runtime, or package-manager behavior looks wrong, run `vp env doctor` and include its output when asking for help.
+
+<!--VITE PLUS END-->

.vite-hooks/pre-commit

@@ -4,10 +4,10 @@
   "private": true,
   "scripts": {
     "bench": "pnpm --filter=bench bench",
-    "fmt": "oxfmt && cargo fmt",
-    "lint": "oxlint",
+    "fmt": "vp fmt && cargo fmt",
+    "lint": "vp lint",
     "test": "pnpm --sequential --filter=integrate* run test",
-    "prepare": "husky"
+    "prepare": "vp config || exit 0"
   },
   "devDependencies": {
     "@napi-rs/cli": "catalog:",
@@ -17,21 +17,9 @@
     "@oxc-project/runtime": "^0.132.0",
     "@types/node": "^25.0.0",
     "emnapi": "^1.4.5",
-    "husky": "^9.1.7",
     "lerna": "^9.0.0",
-    "lint-staged": "^17.0.0",
-    "oxfmt": "^0.57.0",
-    "oxlint": "^1.51.0",
-    "oxlint-tsgolint": "^0.24.0",
-    "typescript": "^6.0.0"
-  },
-  "lint-staged": {
-    "*": [
-      "oxfmt --no-error-on-unmatched-pattern"
-    ],
-    "*.@(js|ts|tsx)": [
-      "oxlint --fix"
-    ]
+    "typescript": "^6.0.0",
+    "vite-plus": "catalog:"
   },
   "packageManager": "pnpm@11.9.0"
 }