Allow plugin url in .tool-versions

[tigerquoll]

Is your feature request related to a problem? Please describe

If a asdf plugin is broken due to a changed tool URL, while a fix PR is pending on the original archive I often fork and fix the issue in my own issue. While using my own fixed asdf plugin, I have to manually install this plugin, which is awkward for my CI system.

Describe the proposed solution

I would like to see the option of specifying a plugin URL in the .tool-versions file that can be used to override the URL of a particular plugin in the plugin repository. An "adsf plugin-add " command should check for this value in preference to the default repo value

Describe similar asdf features and why they are not sufficient

Manually scripting a asdf plugin add, which is a different workflow when adding a default asdf plugin

Describe other workarounds you've considered

Manually specifying every plugin URL rather then take advantage of the URLs in the

[nurulhudaapon]

Are there any plan to implement this?