fix: Add ESLint configuration file

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: asachs01

.eslintrc.json

@@ -0,0 +1,24 @@
+{
+  "root": true,
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 2022,
+    "sourceType": "module"
+  },
+  "plugins": ["@typescript-eslint"],
+  "extends": [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "env": {
+    "node": true,
+    "es2022": true
+  },
+  "rules": {
+    "@typescript-eslint/no-unused-vars": ["error", { "argsIgnorePattern": "^_" }],
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-explicit-any": "warn",
+    "@typescript-eslint/no-non-null-assertion": "warn"
+  },
+  "ignorePatterns": ["dist/", "node_modules/", "*.js"]
+}