Add conda / pip updates to README.md and Documentation

[ma595]

See #127.

This PR adds improved documentation to the README.md for Conda / Pip deployment and in anticipation of #126 and #129.

Progress towards #127

TODO:

• rebase

[CiSong10]

Hi, thank you for this PR. This helps me build the module!

During testing, I encountered an installation error:

error: subprocess-exited-with-error

  × python setup.py egg_info did not run successfully.
  │ exit code: 1
  ╰─> [34 lines of output]
      Traceback (most recent call last):
      ......
      AttributeError: cython_sources

This appears to be related to Cython version compatibility. Following guidance from this Stack Overflow thread, I resolved the issue by:

$ pip install "cython<3.0.0" wheel
$ pip install "pyyaml==5.4.1" --no-build-isolation
$ pip install -r requirements.txt

I hope this PR can be merged!

[PatBall1]

Hi @CiSong10 we were finding it difficult to make things run well through conda before (mostly related to pytorch) but I am open to fixing this. We have conflicts at docs/source/installation.rst and setup.py. Please submit a pull request if you think you can get everything in line.