chore: use .prettierrc.json instead of eslint prettier rule to configure format (#654)

Author: marcalexiei

.prettierrc.json

@@ -1 +1,4 @@
-{}
+{
+  "$schema": "https://json.schemastore.org/prettierrc",
+  "singleQuote": true
+}

eslint.config.js

@@ -25,12 +25,7 @@ export default tseslint.config(
     rules: {
       'n/no-missing-import': 'off', // bug with recognizing node: prefix https://github.com/mysticatea/eslint-plugin-node/issues/275
 
-      'prettier/prettier': [
-        'error',
-        {
-          singleQuote: true,
-        },
-      ],
+      'prettier/prettier': 'error', // see `.prettierrc.json` for format config
 
       // unicorn rules:
       'unicorn/expiring-todo-comments': 'off',