Add a "list commands" function to conda-forge-admin bot and have conda-forge-webservices tell you about this.

[matthewfeickert]

When you interact with conda-forge by either opening up a PR to the https://github.com/conda-forge/staged-recipes or when @regro-cf-autotick-bot opens up a PR on a feedstock, @conda-forge-webservices will automatically run linting and comment.

Examples:

• feat: Add hepdata-lib staged-recipes#26293 (comment)
• pyhf v0.7.6 pyhf-feedstock#24 (comment)

This is very nice, but unless people go and read the Admin web services section of the maintainer docs they won't know/remember all the commands that @conda-forge-admin provides them.

For the Journal of Open Source Software, we have a https://github.com/openjournals/buffy instance called @editorialbot which we can interact with to perform most of the operations of the journal. Importantly, there is a @editorialbot commands command that will have @editorialbot respond with a full list of all the commands that it can perform. When @conda-forge-webservices firsts posts in the Issue or PR that it is interacting with the user in, it would be helpful if it noted that you could ask @conda-forge-admin for a list of all its commands with a similar command, and if a user gave this command, along with its reply there was a link to https://conda-forge.org/docs/maintainer/infrastructure/#admin-web-services.

I realize that this functionality to list commands doesn't exist yet, but it would be super nice if it did.