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/index.css

@@ -67,6 +67,7 @@
 @import "./repo/header.css";
 @import "./repo/home.css";
 @import "./repo/reactions.css";
+@import "./repo/clone.css";
 
 @import "./editor/fileeditor.css";
 @import "./editor/combomarkdowneditor.css";