chore: 更新editorconfig和vscode设置；添加extensions.json

.vscode/settings.json

@@ -0,0 +1,14 @@
+{
+  "editor.codeActionsOnSave": {
+    "source.fixAll": "explicit"
+  },
+  "editor.tabSize": 2,
+  "editor.formatOnSave": true,
+  "editor.defaultFormatter": "esbenp.prettier-vscode",
+  "[wxml]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  },
+  "[wxss]": {
+    "editor.defaultFormatter": "esbenp.prettier-vscode"
+  }
+}