Rearrange README and SETUP files; add info about pip install

[anargyri]

Description

• Separated the part about conda and yaml files from the setup requirements into a new Markdown file.
• Replaced references to conda envs with more general envs.
• Added references to pip installation in the setup guide.

Related Issues

Checklist:

• I have followed the contribution guidelines and code style for this project.
• I have added tests covering my contributions.
• I have updated the documentation accordingly.
• This PR is being made to staging branch and not to main branch.

[miguelgfierro]

We have right now 3 places with dependencies, the old conda file, the setup.py and docs/requirements.txt. And also, two ways of installing, with pip and with conda.

Maybe we can consider the advantages/disadvantages of having this versus having 1 single place where we have all deps and only installation with pip. Do you guys think this is possible?

[gramhagen]

yeah, i agree it will be best if we can consolidate around using pip install for dependencies and remove the conda setup, should we capture this in a new issue?

[anargyri]

yeah, i agree it will be best if we can consolidate around using pip install for dependencies and remove the conda setup, should we capture this in a new issue?

Yes, feel free to create an issue around this. Let's leave it though for after publication on PyPI.

[miguelgfierro]

merging this, we'll review in the future if needed