Rearrange Clone Panel (#31142)

Rearrange the clone panel to use less horizontal space.
The following changes have been made to achieve this:
- Moved everything into the dropdown menu
- Moved the HTTPS/SSH Switch to a separate line
- Moved the "Clone in VS Code"-Button up and added a divider
- Named the dropdown button "Code", added appropriate icon

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Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>

web_src/css/repo/wiki.css

@@ -59,9 +59,6 @@
 }
 
 @media (max-width: 767.98px) {
-  .repository.wiki .clone-panel #repo-clone-url {
-    width: 160px;
-  }
   .repository.wiki .wiki-content-main.with-sidebar,
   .repository.wiki .wiki-content-sidebar {
     float: none;