refactor: to typescript

we introduce the typescript plugin to rollup and convert the js files to typescript without any meaningful changes to the code

Author: lassediercks

.github/workflows/lint.yml

@@ -41,5 +41,27 @@ jobs:
         uses: pnpm/action-setup@v4
       - name: Install dependencies
         run: pnpm install
-      - name: Lint JS files
+      - name: Lint files
         run: pnpm run lint
+  Typecheck:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+      - name: Setup Node
+        uses: actions/setup-node@v4
+        with:
+          node-version: "20"
+      - name: Restore node_modules cache
+        uses: actions/cache@v4
+        with:
+          path: node_modules
+          key: ${{ runner.os }}-node-modules-${{ hashFiles('package.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-modules
+      - name: Install pnpm
+        uses: pnpm/action-setup@v4
+      - name: Install dependencies
+        run: pnpm install
+      - name: Typecheck files
+        run: pnpm run typecheck

package.json

@@ -29,8 +29,9 @@
     "vitest": "^3.2.4"
   },
   "scripts": {
+    "typecheck": "tsc --noEmit",
     "build": "vite build",
-    "lint": "prettier --check 'src/**/*.js'",
+    "lint": "prettier --check 'src/**/*'",
     "test": "vitest"
   },
   "packageManager": "pnpm@10.12.1"