feat(code): add toggle code block functionality and enhance code tabs (#719)

* feat(markup): add toggle code block functionality with multiple format support

* fix(assets): improve filename generation for code downloads

* feat(code): add `before_tabs` attribute support for tabbed code blocks

* feat(code): implement visibility control for first tab content in code blocks

apps/test/content/posts/codeblock-test.md

@@ -180,6 +180,18 @@ function add(a, b) {
 
     <p>Lorem ipsum dolor sit amet, graecis denique ei vel, at duo primis mandamus. Et legere ocurreret pri, animal tacimates complectitur ad cum. Cu eum inermis inimicus efficiendi. Labore officiis his ex, soluta officiis concludaturque ei qui, vide sensibus vim ad.</p>
 
+## Code Toggle
+
+```toggle {before_tabs="hugo."}
+[params]
+description = ''
+keywords = []
+
+[params.codeblock]
+mode = 'classic'
+wrapper = true
+```
+
 ## Code block inside other blocks
 
 > [!NOTE]+