Need direction on Bitbucket (server) plugin development

I’m new to the Atlassian plugin development and need help on direction, I’m trying to add custom fields (button and text field) on the Repository page, I used ?web.items&web.panels&web.sections at the end of repo URI and found the place (location/section) as Web Panel : bitbucket.web.repository.browse.filebrowser.before. However, when I try to add the module to plugin development using atlas-create-bitbucket-plugin, the web panel option does not show up.

  1. Is it not supported?

I tried manually adding web-panel in plugin xml file with soy template and it loads custom UI, can I proceed with this approach?