fix: Downgrade eslint to v9 and add TS 6 ignoreDeprecations

- Downgrade eslint and @eslint/js from ^10 back to ^9 since
  eslint-plugin-react@7.37.5 does not support eslint 10 (uses
  removed getFilename() API)
- Add ignoreDeprecations: 6.0 to tsconfig.json to silence
  TypeScript 6 deprecation error for the baseUrl option

Author: unional

package.json

@@ -60,7 +60,7 @@
   },
   "devDependencies": {
     "@commitlint/config-conventional": "^20.5.0",
-    "@eslint/js": "^10.0.1",
+    "@eslint/js": "^9.39.4",
     "@storybook/addon-docs": "next",
     "@storybook/icons": "^2.0.0",
     "@storybook/react-vite": "next",
@@ -71,7 +71,7 @@
     "auto": "^11.3.6",
     "boxen": "^8.0.1",
     "commitlint": "^20.5.0",
-    "eslint": "^10.1.0",
+    "eslint": "^9.39.4",
     "eslint-config-prettier": "^10.1.8",
     "eslint-plugin-prettier": "^5.5.5",
     "eslint-plugin-react": "^7.37.5",