chore: add initial eslint configuration

rules will need some finetuning still

eslint.config.js

@@ -0,0 +1,24 @@
+import eslint from "@eslint/js";
+import tseslint from "typescript-eslint";
+
+export default tseslint.config(
+    eslint.configs.recommended,
+    tseslint.configs.recommended,
+    // consider using rules below, once we have a full TS codebase and can be more strict
+    // tseslint.configs.strictTypeChecked,
+    // tseslint.configs.stylisticTypeChecked,
+    //tseslint.configs.recommendedTypeChecked,
+    {
+        languageOptions: {
+            parserOptions: {
+                projectService: true,
+                tsconfigRootDir: import.meta.dirname
+            }
+        }
+    },
+    {
+        rules: {
+            // add rule overrides here
+        }
+    }
+);

package.json

@@ -168,6 +168,7 @@
     "@electron-forge/maker-zip": "7.7.0",
     "@electron-forge/plugin-auto-unpack-natives": "7.7.0",
     "@electron/rebuild": "3.7.1",
+    "@eslint/js": "9.21.0",
     "@playwright/test": "1.50.1",
     "@popperjs/core": "2.11.8",
     "@types/archiver": "6.0.3",
@@ -216,6 +217,7 @@
     "cross-env": "7.0.3",
     "css-loader": "7.1.2",
     "electron": "34.3.0",
+    "eslint": "9.21.0",
     "esm": "3.2.25",
     "i18next-http-backend": "3.0.2",
     "jsdoc": "4.0.4",
@@ -235,6 +237,7 @@
     "tsx": "4.19.3",
     "typedoc": "0.27.9",
     "typescript": "5.8.2",
+    "typescript-eslint": "8.25.0",
     "vitest": "3.0.7",
     "webpack": "5.98.0",
     "webpack-cli": "6.0.1",