Feature request: easy way to get a permalink

[Trevor Gross]

Hello all,

It's pretty useful to be able to share a link to a source view that
doesn't get outdated if the source updates. cgit supports these links
but it requires a few steps to create them. Would it be possible to add
a button that makes this easier?

For example, when visiting this URL:

     https://git.zx2c4.com/cgit/tree/README#n4

There could be a `permalink` button in the `path: root/README` bar (or
perhaps next to `(plain) (blame)`) that replaces the URL with:

     
https://git.zx2c4.com/cgit/tree/README?id=044821677c774cd24f25f1818ea51d09cc64b006#n4

04482167 being the most recent commit. This should work for directories
in the tree view as well, though the `path:` bar is not visible at root.

GitHub and GitLab have something similar under the triple dots menu,
which also copies the link to the clipboard.

Kind regards,
Trevor