lint: prepare eslint

package.json

@@ -3,6 +3,9 @@
   "version": "0.7.1",
   "description": "Adds item pricing to the Team Fortress 2 wiki",
   "devDependencies": {
+    "@eslint/css": "^0.7.0",
+    "@eslint/js": "^9.25.1",
+    "@eslint/json": "^0.12.0",
     "@happy-dom/global-registrator": "^17.4.4",
     "@types/firefox-webext-browser": "^120.0.4",
     "@types/greasemonkey": "^4.0.7",
@@ -12,10 +15,13 @@
     "buffer": "^6.0.3",
     "bun-types": "^1.2.5",
     "copy-webpack-plugin": "^12.0.2",
+    "eslint": "^9.25.1",
+    "globals": "^16.0.0",
     "path-browserify": "^1.0.1",
     "raw-loader": "^4.0.2",
     "tf2-static-schema": "^1.74.0",
     "ts-loader": "^9.5.1",
+    "typescript-eslint": "^8.31.0",
     "webpack": "^5.94.0",
     "webpack-cli": "^5.1.4"
   },