EsLint v9 (#154)

* Upgrade ESLint and related configurations to version 9

- Update ESLint to version 9.19.0
- Migrate ESLint configurations to flat config format
- Remove deprecated ESLint config files
- Update package dependencies and configurations
- Simplify ESLint setup across packages
- Remove unnecessary ESLint config blocks from package.json files
- Improved CI caching with Turborepo tasks
- Removed duplicate styles

packages/monitoring/core/eslint.config.mjs

@@ -0,0 +1,3 @@
+import eslintConfigBase from '@kit/eslint-config/base.js';
+
+export default eslintConfigBase;

packages/monitoring/core/package.json

@@ -20,13 +20,6 @@
     "@types/react": "19.0.8",
     "react": "19.0.0"
   },
-  "eslintConfig": {
-    "root": true,
-    "extends": [
-      "@kit/eslint-config/base",
-      "@kit/eslint-config/react"
-    ]
-  },
   "typesVersions": {
     "*": {
       "*": [