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/package.json

@@ -10,7 +10,8 @@
 		"typecheck": "tsc -p tsconfig.app.json --noEmit && tsc -p tsconfig.e2e.json --noEmit",
 		"e2e": "playwright test",
 		"e2e:ui": "playwright test --ui",
-		"lint": "ng lint"
+		"lint": "ng lint",
+		"prepare": "cd .. && frontend/node_modules/.bin/husky"
 	},
 	"private": true,
 	"packageManager": "bun@1.3.14",
@@ -35,13 +36,15 @@
 		"@eslint/js": "^10.0.1",
 		"@playwright/test": "^1.61.1",
 		"@types/node": "^24.0.0",
+		"@vitest/coverage-v8": "^4.1.10",
 		"angular-eslint": "22.1.0",
 		"eslint": "^10.6.0",
-		"@vitest/coverage-v8": "^4.1.10",
+		"husky": "^9.1.7",
 		"jsdom": "^28.0.0",
+		"lint-staged": "^17.2.0",
 		"prettier": "^3.8.1",
 		"typescript": "~6.0.2",
 		"typescript-eslint": "8.62.1",
 		"vitest": "^4.0.8"
 	}
-}
+}