add help target to Makefile

[JDRanpariya]

on doing make or make help it shows available target and intended use.

I think makefile can be improved further to setup dev environment to clean unused stuff, do you guys think it's good idea to do that?

[CLAassistant]

All committers have signed the CLA.

[WT-MM]

This help target makes sense to me. General question about whether we want to tie the message to Python though?

Also can you elaborate on adding targets to clean up the dev environment?

[JDRanpariya]

I don't understand what you mean by if we want tie the message to Python?

On adding targets to clean up, it's simply make clean that would remove the folders that are generated after you build the project, probably dist or cache folders for ruff and mypy(from make format etc), it's not required tbh, but maybe we can have make install which installs the package instead of doing pip install -e .[dev] etc.