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

---------

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

web_src/js/utils/url.ts

@@ -13,3 +13,19 @@ export function isUrl(url: string): boolean {
     return false;
   }
 }
+
+// Convert an absolute or relative URL to an absolute URL with the current origin. It only
+// processes absolute HTTP/HTTPS URLs or relative URLs like '/xxx' or '//host/xxx'.
+export function toOriginUrl(urlStr: string) {
+  try {
+    if (urlStr.startsWith('http://') || urlStr.startsWith('https://') || urlStr.startsWith('/')) {
+      const {origin, protocol, hostname, port} = window.location;
+      const url = new URL(urlStr, origin);
+      url.protocol = protocol;
+      url.hostname = hostname;
+      url.port = port || (protocol === 'https:' ? '443' : '80');
+      return url.toString();
+    }
+  } catch {}
+  return urlStr;
+}