chore: add eslint as linter

eslint.config.js

@@ -0,0 +1,43 @@
+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
+            "no-undef": "off",
+            "no-unused-vars": "off",
+            "@typescript-eslint/no-unused-vars": [
+                "error",
+                {
+                    "argsIgnorePattern": "^_",
+                    "varsIgnorePattern": "^_",
+                }
+            ]
+        }
+    },
+    {
+        ignores: [
+            "build/*",
+            "dist/*",
+            "docs/*",
+            "libraries/*",
+            "src/public/app-dist/*",
+            "src/public/app/doc_notes/*"
+        ]
+    }
+);