Add readline for macOS github build

[mcuee]

This pull request adds the support for readline for the github action macOS Homebrew build. It will use readline instead of libedit.

Sign-off by xiaofanc@gmail.com

[MCUdude]

Thanks for the PR!

There are quite a few commits and not that many changes to the codebase. One of the commits removes a line, while the next one adds it back again, but is slightly modified. Maybe you could try to squash/combine a few commits that "does the same thing"? Thanks!

[mcuee]

Thanks for the PR!

There are quite a few commits and not that many changes to the codebase. One of the commits removes a line, while the next one adds it back again, but is slightly modified. Maybe you could try to squash/combine a few commits that "does the same thing"? Thanks!

@MCUdude

You are right. I was carrying out trial and error to see what works for github action. I am still learning to use git (usally only using git clone, git pull and git checkout). I will see what I can do.

I think this PR needs more testing as well, for example, for people using MacPorts (supposedly to work as no changes for MacPorts users).

[mcuee]

I think I messed up my git repo somehow. I will close this one and create a new one.