fix(migrate): remove ESLint plugins/configs and detect type-aware usage

`vp migrate` left `eslint-plugin-*`, `eslint-config-*`, `typescript-eslint`,
and `@typescript-eslint/*` behind in `package.json` after removing `eslint`
itself, leaving the user with dead packages that only configure ESLint.

Expand `rewriteEslintPackageJson` to drop those plus scoped variants
(e.g. `@vue/eslint-config-typescript`). Add a `hasTypeAwareEslintConfig`
heuristic that recognizes `recommendedTypeChecked`, `projectService`, and
`parserOptions.project` across flat configs, legacy `.eslintrc.*`, and
`package.json#eslintConfig`, and record the result on the migration report
so downstream messaging can be transparent about preserving type-aware
coverage in the resulting Oxlint config.

Addresses PR comments r3255784734, r3255786019, r3255859061 from
WeakAuras/WeakAuras-Companion#2956.

Author: fengmk2

packages/cli/snap-tests-global/migration-eslint-plugins-cleanup/eslint.config.mjs

@@ -0,0 +1,7 @@
+export default [
+  {
+    rules: {
+      'no-unused-vars': 'error',
+    },
+  },
+];

packages/cli/snap-tests-global/migration-eslint-plugins-cleanup/package.json

@@ -0,0 +1,20 @@
+{
+  "name": "migration-eslint-plugins-cleanup",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "lint": "eslint ."
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^8.0.0",
+    "@typescript-eslint/parser": "^8.0.0",
+    "@vitejs/plugin-vue": "^6.0.0",
+    "@vue/eslint-config-typescript": "^14.0.0",
+    "eslint": "^9.0.0",
+    "eslint-config-airbnb": "^19.0.0",
+    "eslint-plugin-vue": "^10.0.0",
+    "typescript-eslint": "^8.0.0",
+    "vite": "^7.0.0",
+    "vue": "^3.5.0"
+  }
+}

packages/cli/snap-tests-global/migration-eslint-plugins-cleanup/snap.txt

@@ -0,0 +1,26 @@
+> vp migrate --no-interactive # migration should remove ESLint and its plugins/configs
+◇ Migrated . to Vite+
+• Node <semver>  pnpm <semver>
+• 4 config updates applied
+• ESLint rules migrated to Oxlint
+• TypeScript shim added for framework component files
+
+> cat package.json # check eslint, eslint-plugin-*, eslint-config-*, typescript-eslint and @typescript-eslint/* are removed
+{
+  "name": "migration-eslint-plugins-cleanup",
+  "scripts": {
+    "dev": "vp dev",
+    "build": "vp build",
+    "lint": "vp lint .",
+    "prepare": "vp config"
+  },
+  "devDependencies": {
+    "@vitejs/plugin-vue": "^6.0.0",
+    "vite": "catalog:",
+    "vue": "^3.5.0",
+    "vite-plus": "catalog:"
+  },
+  "packageManager": "pnpm@<semver>"
+}
+
+> test ! -f eslint.config.mjs # check eslint config is removed

packages/cli/snap-tests-global/migration-eslint-plugins-cleanup/steps.json

@@ -0,0 +1,7 @@
+{
+  "commands": [
+    "vp migrate --no-interactive # migration should remove ESLint and its plugins/configs",
+    "cat package.json # check eslint, eslint-plugin-*, eslint-config-*, typescript-eslint and @typescript-eslint/* are removed",
+    "test ! -f eslint.config.mjs # check eslint config is removed"
+  ]
+}

packages/cli/snap-tests-global/migration-eslint-type-aware/eslint.config.mjs

@@ -0,0 +1,15 @@
+// Flat config exercising the type-aware sniffer without importing
+// typescript-eslint at runtime, so `@oxlint/migrate` can load the file
+// in the snap-test sandbox where no node_modules are installed.
+export default [
+  {
+    languageOptions: {
+      parserOptions: {
+        projectService: true,
+      },
+    },
+    rules: {
+      'no-unused-vars': 'error',
+    },
+  },
+];

packages/cli/snap-tests-global/migration-eslint-type-aware/package.json

@@ -0,0 +1,16 @@
+{
+  "name": "migration-eslint-type-aware",
+  "scripts": {
+    "dev": "vite",
+    "build": "vite build",
+    "lint": "eslint ."
+  },
+  "devDependencies": {
+    "@typescript-eslint/eslint-plugin": "^8.0.0",
+    "@typescript-eslint/parser": "^8.0.0",
+    "eslint": "^9.0.0",
+    "typescript": "^5.6.0",
+    "typescript-eslint": "^8.0.0",
+    "vite": "^7.0.0"
+  }
+}

packages/cli/snap-tests-global/migration-eslint-type-aware/snap.txt

@@ -0,0 +1,60 @@
+> vp migrate --no-interactive # migration should preserve type-aware coverage
+◇ Migrated . to Vite+
+• Node <semver>  pnpm <semver>
+• 4 config updates applied
+• ESLint rules migrated to Oxlint
+
+> cat package.json # check typescript-eslint and @typescript-eslint/* are removed; typescript is preserved
+{
+  "name": "migration-eslint-type-aware",
+  "scripts": {
+    "dev": "vp dev",
+    "build": "vp build",
+    "lint": "vp lint .",
+    "prepare": "vp config"
+  },
+  "devDependencies": {
+    "typescript": "^5.6.0",
+    "vite": "catalog:",
+    "vite-plus": "catalog:"
+  },
+  "packageManager": "pnpm@<semver>"
+}
+
+> cat vite.config.ts # check options.typeAware/typeCheck = true is set in the lint block
+import { defineConfig } from 'vite-plus';
+
+export default defineConfig({
+  staged: {
+    "*": "vp check --fix"
+  },
+  fmt: {},
+  lint: {
+    "plugins": [
+      "oxc",
+      "typescript",
+      "unicorn",
+      "react"
+    ],
+    "categories": {
+      "correctness": "warn"
+    },
+    "env": {
+      "builtin": true
+    },
+    "rules": {
+      "no-unused-vars": "error",
+      "vite-plus/prefer-vite-plus-imports": "error"
+    },
+    "options": {
+      "typeAware": true,
+      "typeCheck": true
+    },
+    "jsPlugins": [
+      {
+        "name": "vite-plus",
+        "specifier": "vite-plus/oxlint-plugin"
+      }
+    ]
+  },
+});

packages/cli/snap-tests-global/migration-eslint-type-aware/steps.json

@@ -0,0 +1,7 @@
+{
+  "commands": [
+    "vp migrate --no-interactive # migration should preserve type-aware coverage",
+    "cat package.json # check typescript-eslint and @typescript-eslint/* are removed; typescript is preserved",
+    "cat vite.config.ts # check options.typeAware/typeCheck = true is set in the lint block"
+  ]
+}

packages/cli/snap-tests-global/migration-eslint-type-aware/tsconfig.json

@@ -0,0 +1,10 @@
+{
+  "compilerOptions": {
+    "target": "ES2022",
+    "module": "ESNext",
+    "moduleResolution": "Bundler",
+    "strict": true,
+    "skipLibCheck": true
+  },
+  "include": ["src/**/*"]
+}