chore(format): add prettier config and scripts

Author: unadlib

.prettierignore

@@ -0,0 +1,5 @@
+dist
+coverage
+test-results
+playwright-report
+node_modules

.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "semi": false,
+  "singleQuote": true,
+  "trailingComma": "all",
+  "printWidth": 100
+}

package.json

@@ -45,6 +45,8 @@
     "prepack": "pnpm run build",
     "dev": "tsup --watch",
     "lint": "eslint .",
+    "format": "prettier --write .",
+    "format:check": "prettier --check .",
     "typecheck": "tsc -p tsconfig.build.json --noEmit",
     "test": "vitest run",
     "test:it": "vitest run --config vitest.it.config.ts",
@@ -80,6 +82,7 @@
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-import-x": "^4.16.1",
     "jsdom": "^28.1.0",
+    "prettier": "^3.8.1",
     "react": "^19.2.4",
     "react-dom": "^19.2.4",
     "tsup": "^8.5.1",