Upgrade eslint (#1014)

It's apparently forced now to use the eslint.config.js instead of
.eslintrc

It got more strict with requiring the underscore on unused vars like
`catch(_err)` , but that was all

Closes #1012
Closes #995
Closes #992

## Launch Checklist

<!-- Thanks for the PR! Feel free to add or remove items from the
checklist. -->


 - [ ] Briefly describe the changes in this PR.
 - [ ] Link to related issues.
- [ ] Include before/after visuals or gifs if this PR includes visual
changes.
 - [ ] Write tests for all new functionality.
 - [ ] Add an entry to `CHANGELOG.md` under the `## main` section.

package.json

@@ -9,7 +9,7 @@
     "build": "tsc && vite build --base=/maputnik/",
     "build-desktop": "tsc && vite build --base=/ && cd desktop && make",
     "i18n:refresh": "i18next 'src/**/*.{ts,tsx,js,jsx}'",
-    "lint": "eslint ./src ./cypress --ext ts,tsx,js,jsx --report-unused-disable-directives --max-warnings 0",
+    "lint": "eslint",
     "test": "cypress run",
     "cy:open": "cypress open",
     "lint-css": "stylelint \"src/styles/*.scss\"",
@@ -93,6 +93,7 @@
   },
   "devDependencies": {
     "@cypress/code-coverage": "^3.13.10",
+    "@eslint/js": "^9.18.0",
     "@istanbuljs/nyc-config-typescript": "^1.0.2",
     "@rollup/plugin-replace": "^6.0.2",
     "@shellygo/cypress-test-utils": "^4.1.11",
@@ -121,13 +122,11 @@
     "@types/string-hash": "^1.1.3",
     "@types/uuid": "^10.0.0",
     "@types/wicg-file-system-access": "^2023.10.5",
-    "@typescript-eslint/eslint-plugin": "^7.3.1",
-    "@typescript-eslint/parser": "^7.3.1",
     "@vitejs/plugin-react": "^4.3.4",
     "cors": "^2.8.5",
     "cypress": "^14.0.0",
     "cypress-plugin-tab": "^1.0.5",
-    "eslint": "^8.57.0",
+    "eslint": "^9.18.0",
     "eslint-plugin-react": "^7.37.4",
     "eslint-plugin-react-hooks": "^5.1.0",
     "eslint-plugin-react-refresh": "^0.4.18",
@@ -141,6 +140,7 @@
     "stylelint-config-recommended-scss": "^14.1.0",
     "stylelint-scss": "^6.10.1",
     "typescript": "^5.7.3",
+    "typescript-eslint": "^8.21.0",
     "uuid": "^11.0.5",
     "vite": "^6.0.11",
     "vite-plugin-istanbul": "^6.0.2"