feat: add build pipeline

package.json

@@ -1,6 +1,7 @@
 {
   "name": "plainidx",
   "version": "1.0.0",
+  "private": true,
   "packageManager": "pnpm@9.15.0",
   "description": "",
   "main": "index.js",
@@ -17,6 +18,8 @@
   "devDependencies": {
     "@eslint/eslintrc": "^3.2.0",
     "@eslint/js": "^9.16.0",
+    "@pnpm/find-workspace-packages": "^6.0.9",
+    "@types/node": "^22.10.1",
     "@vitest/coverage-v8": "2.1.8",
     "eslint": "^9.16.0",
     "eslint-config-prettier": "^9.1.0",