chore: add eslint

functions/.eslintrc.js

@@ -0,0 +1,12 @@
+module.exports = {
+  root: true,
+  extends: ["typescript"],
+  rules: {
+    quotes: ["error", "double"],
+    "@typescript-eslint/explicit-function-return-type": "off",
+    "@typescript-eslint/no-explicit-any": "off",
+    "comma-dangle": "off",
+    "react-native/no-inline-styles": "off",
+    "@typescript-eslint/indent": "off"
+  }
+};