Add CS2-SimpleAdmin documentation site

Introduces a new documentation site for CS2-SimpleAdmin using Docusaurus, including developer API references, tutorials, user guides, and module documentation. Removes the CleanModule example and updates FunCommands and ExampleModule. Also updates main plugin and API files to support new documentation and module structure.

CS2-SimpleAdmin-docs/docs/tutorial-basics/create-a-document.md

@@ -0,0 +1,57 @@
+---
+sidebar_position: 2
+---
+
+# Create a Document
+
+Documents are **groups of pages** connected through:
+
+- a **sidebar**
+- **previous/next navigation**
+- **versioning**
+
+## Create your first Doc
+
+Create a Markdown file at `docs/hello.md`:
+
+```md title="docs/hello.md"
+# Hello
+
+This is my **first Docusaurus document**!
+```
+
+A new document is now available at [http://localhost:3000/docs/hello](http://localhost:3000/docs/hello).
+
+## Configure the Sidebar
+
+Docusaurus automatically **creates a sidebar** from the `docs` folder.
+
+Add metadata to customize the sidebar label and position:
+
+```md title="docs/hello.md" {1-4}
+---
+sidebar_label: 'Hi!'
+sidebar_position: 3
+---
+
+# Hello
+
+This is my **first Docusaurus document**!
+```
+
+It is also possible to create your sidebar explicitly in `sidebars.js`:
+
+```js title="sidebars.js"
+export default {
+  tutorialSidebar: [
+    'intro',
+    // highlight-next-line
+    'hello',
+    {
+      type: 'category',
+      label: 'Tutorial',
+      items: ['tutorial-basics/create-a-document'],
+    },
+  ],
+};
+```