chore: add husky pre-commit hook and lint-staged configuration

- Created a pre-commit hook in .husky to run lint-staged.
- Added .lintstagedrc.mjs to format frontend files with Prettier and apply Spotless to backend Java files.
- Introduced .prettierignore to exclude specific directories from formatting.

frontend/tsconfig.app.json

@@ -8,10 +8,6 @@
 	"angularCompilerOptions": {
 		"strictTemplates": true
 	},
-	"include": [
-		"src/**/*.ts"
-	],
-	"exclude": [
-		"src/**/*.spec.ts"
-	]
-}
+	"include": ["src/**/*.ts"],
+	"exclude": ["src/**/*.spec.ts"]
+}