Added api doc

- Added zoraxy_plugin module api doc generating script
- Added link to example source folder
- Fixed a few minor typo

docs/plugins/template/documents.html

@@ -71,8 +71,8 @@
                 <a href="#!" class="is-active item">
                     Documents
                 </a>
-                <a href="#!" class="item">
-                    Examples
+                <a href="https://github.com/tobychui/zoraxy/tree/main/example/plugins" target="_blank" class="item">
+                    Examples <span class="ts-icon is-arrow-up-right-from-square-icon"></span>
                 </a>
             </div>
         </div>