🔧 Replace Vite/Vitest with TypeScript 7 and node --test

- Use tsc 7 for build (vite no longer needed for a Node library)
- Use node --test with --experimental-strip-types for tests (vitest dropped)
- Use c8 for coverage instead of vitest's built-in coverage
- Add tsconfig.build.json separating typecheck from emit config
- Drop DOM lib, add strict noUncheckedIndexedAccess/noImplicitOverride
- Pin engines.node to >=22.6 (required for --experimental-strip-types)
- Update CI to Node 24 LTS (unflagged strip-types)
- Add @types/node for node:test / node:assert types

.github/workflows/ci.yml

@@ -5,7 +5,7 @@ on:
         branches: [main]
     pull_request:
         branches: [main]
-    workflow_dispatch:
+    workflow_dispatch: {}
 
 jobs:
     build:
@@ -14,18 +14,12 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-node@v4
               with:
-                  node-version: 20
+                  node-version: 24
                   cache: "npm"
             - run: npm ci
             - run: npm run build
             - run: npm run check
             - run: npm run test:ci
-            - run: npm run check:outdated
-            - run: npm run check:cspell
-            - run: npm run check:tsc
-            - run: npm run check:eslint
-            - run: npm run check:prettier
-            - run: npm run check:package
             - name: Upload coverage
               uses: actions/upload-artifact@v4
               with:
@@ -40,10 +34,10 @@ jobs:
             - uses: actions/checkout@v4
             - uses: actions/setup-node@v4
               with:
-                  node-version: 20
+                  node-version: 24
                   registry-url: "https://registry.npmjs.org/"
             - run: npm ci
             - run: npm run build
             - run: npm publish --access public
               env:
-                  NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
+                  NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}