Add `pyodide build-recipes clean` subcommand for cleaning up the downloaded files

[ryanking13]

Description

pyodide build-recipes is a command to build Pyodide recipes, such as recipes in pyodide/pyodide-recipes. Currently, it does not support a way clean up the files that are downloaded from the URL, and those generated during the build step. I think it would be good to have one.

• pyodide build-recipes clean: clean up all the temporary files in the build directory.
• pyodide build-recipes clean <pkg> <tag:...> clean up only the files in the specified directory
  • Should we consider dependencies? I guess not.
• It should not remove the dist directory, which is used to store the built wheels
  • Or we can probably add some flags, something like --all, --include-dist, to clean up those directories as well?

[teddygood]

Can I work on this issue?

[ryanking13]

Assign yo you @teddygood. Thanks!