chore: install and configure prettier

Signed-off-by: Tobias Kuppens Groot <[email protected]>

Author: tkgroot

.prettierignore

@@ -0,0 +1 @@
+lib/

package-lock.json

@@ -31,12 +31,17 @@
     "@rollup/plugin-replace": "^4.0.0",
     "jest": "^28.1.3",
     "jest-environment-jsdom": "^28.1.3",
+    "prettier": "^2.8.1",
     "rollup": "^2.77.2",
     "rollup-plugin-terser": "^7.0.2"
   },
   "scripts": {
     "build": "rollup -c",
     "dev": "rollup -c -w",
+    "format": "npm run format:prettier",
+    "format:prettier": "prettier . --write",
+    "lint": "npm run lint:prettier",
+    "lint:prettier": "prettier . --check",
     "test": "node --experimental-vm-modules --no-warnings node_modules/jest/bin/jest.js --watch"
   }
 }