cf: a conda-forge CLI

Tasks:

• A feedstock subcommand (maybe accept alias f, fs): clone and start working on a given feedstock. The argument should just be the project name sans-"feedstock", not the whole URL or user/repo pair. So given a name e.g. numpy, clone https://github.com/conda-forge/numpy-feedstock.
  • It could also have subsubcommands (maybe even all the conda-forge-admin commands)
    • "update version"
    • "rerender"
    • "lint"
    • add a migrator
    • config: conda-forge.yml shortcuts, maybe TUI with dropdowns and whatnot
  • Once ready, a PR should be opened (after forking and updating the branch remote) or updated for that branch.
  • We should also be able to work an open PR created by someone else (including bots). Directly on branch if a maintainer, or by forking first.
  • More tasks:
    • Check versions
• staged-recipes tooling: create new recipe with a cookiecutter template or something like that.
• A status subcommand for migrations, version updates, etc.