chore: remove dead code and unused dependencies

- Delete 4 unused files detected by knip
- Remove lint-staged, eslint-config-prettier, plausible-tracker
- Clean up knip.json entry patterns

package.json

@@ -103,13 +103,10 @@
 		"babel-plugin-react-compiler": "^1.0.0",
 		"dotenv": "^16.4.0",
 		"eslint": "^10.7.0",
-		"eslint-config-prettier": "^10.1.8",
 		"eslint-plugin-unused-imports": "^4.4.1",
 		"husky": "^9.1.7",
 		"knip": "^6.27.0",
-		"lint-staged": "^17.1.0",
 		"pino-pretty": "^13.1.3",
-		"plausible-tracker": "^0.3.9",
 		"postcss": "^8.5.21",
 		"prisma": "^7.9.0",
 		"tailwindcss": "^4.3.3",