Added api doc

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

docs/plugins/html/2. Architecture/6. Compile a Plugin.html

@@ -69,8 +69,9 @@
           <a href="#!" class="is-active item">
             Documents
           </a>
-          <a href="#!" class="item">
+          <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>
@@ -148,6 +149,9 @@
                 <a class="item" href="/plugins/html/index.html">
                   index
                 </a>
+                <a class="item" href="/plugins/html/zoraxy_plugin API.html">
+                  zoraxy_plugin API
+                </a>
               </div>
             </div>
           </div>