Add Xcode Extension

extensions/xcode/.eslintrc.json

@@ -0,0 +1,13 @@
+{
+  "root": true,
+  "env": {
+    "es2020": true,
+    "node": true
+  },
+  "parser": "@typescript-eslint/parser",
+  "plugins": ["@typescript-eslint"],
+  "extends": ["eslint:recommended", "plugin:@typescript-eslint/recommended", "prettier"],
+  "rules": {
+    "no-case-declarations": "off"
+  }
+}

extensions/xcode/.prettierrc

@@ -0,0 +1,4 @@
+{
+  "printWidth": 120,
+  "singleQuote": false
+}