rename the code block extension, add content to the code block extension

docs/src/docPages/api/extensions/code-block.md

@@ -2,10 +2,20 @@
 Enables you to use the `<pre>` HTML tag in the editor.
 
 ## Options
-*None*
+| Option | Type   | Default | Description                                  |
+| ------ | ------ | ------- | -------------------------------------------- |
+| class  | string | –       | Add a custom class to the rendered HTML tag. |
 
 ## Commands
-*None*
+| Command   | Options | Description                   |
+| --------- | ------- | ----------------------------- |
+| codeBlock | —       | Wrap content in a code block. |
 
 ## Keyboard shortcuts
-*None*
+* `Shift` + `Control` + `\`
+
+## Source Code
+[packages/extension-code-block/](https://github.com/ueberdosis/tiptap-next/blob/main/packages/extension-code-block/)
+
+## Usage
+<demo name="Extensions/CodeBlock" highlight="3-5,17,36" />