arco-cli: initialize project

.prettierrc.js

@@ -0,0 +1,9 @@
+module.exports = {
+  tabWidth: 2,
+  semi: true,
+  printWidth: 80,
+  singleQuote: true,
+  quoteProps: 'consistent',
+  htmlWhitespaceSensitivity: 'strict',
+  vueIndentScriptAndStyle: true,
+};