add: readme start with github codespace

README.md

@@ -140,6 +140,18 @@ This is also how your plugin will be released and used by others.
 - Fork this repo/Click `Use this template`;
 - Git clone the forked repo;
 - Enter the repo folder;
+<details >
+<summary>💡 Start with GitHub Codespace</summary>
+
+*GitHub CodeSpace* enables you getting started without the need to download code/IDE/dependencies locally.
+
+Replace the steps above and build you first plugin in 30 seconds!
+
+- Goto top of the [homepage](https://github.com/windingwind/zotero-plugin-template), click the green button `Use this template`, click `Open in codespace`. You may need to login to your GitHub account.
+- Wait for codespace to load.
+
+</details>
+
 - Modify the settings in `./package.json`, including:
 
   ```json5