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/analytics/eslint.config.mjs

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

packages/analytics/package.json

@@ -18,13 +18,6 @@
     "@kit/tsconfig": "workspace:*",
     "@types/node": "^22.13.0"
   },
-  "eslintConfig": {
-    "root": true,
-    "extends": [
-      "@kit/eslint-config/base",
-      "@kit/eslint-config/react"
-    ]
-  },
   "typesVersions": {
     "*": {
       "*": [

packages/analytics/src/null-analytics-service.ts

@@ -3,7 +3,6 @@ import { AnalyticsService } from './types';
 const noop = (event: string) => {
   // do nothing - this is to prevent errors when the analytics service is not initialized
 
-  // eslint-disable-next-line @typescript-eslint/require-await
   return async (...args: unknown[]) => {
     console.debug(
       `Noop analytics service called with event: ${event}`,