fix: allow test file warnings in CI linting

- Remove deprecated --ext flags from lint scripts
- Add --max-warnings 20 to allow current test warnings
- Ensures CI passes with 0 errors while maintaining strict rules
- Test warnings are permitted but errors still fail CI

Author: Mearman

package.json

@@ -22,8 +22,8 @@
     "test": "vitest",
     "test:run": "vitest run",
     "test:coverage": "vitest run --coverage",
-    "lint": "eslint src/ --ext .ts,.tsx,.js,.jsx",
-    "lint:fix": "eslint src/ --ext .ts,.tsx,.js,.jsx --fix",
+    "lint": "eslint src/ --max-warnings 20",
+    "lint:fix": "eslint src/ --fix",
     "format": "tsx scripts/format.ts",
     "format:check": "tsx scripts/format-check.ts",
     "check": "npm run lint && npm run format:check && npm run typecheck",