Doc links update

[alexanderkell]

Description

Updates the dead links in the documentation to the case studies with the csv files.

Fixes # (issue)

Type of change

• New feature (non-breaking change which adds functionality)
• Optimization (non-breaking, back-end change that speeds up the code)
• Bug fix (non-breaking change which fixes an issue)
• Breaking change (whatever its nature)

Key checklist

• All tests pass: $ python -m pytest
• The documentation builds and looks OK: $ python setup.py build_sphinx

Further checks

• Code is commented, particularly in hard-to-understand areas
• Tests added that prove fix is effective or that feature works

[alexanderkell]

This PR solves #7 I believe

[sgiarols]

• overview.rst: foresight could be an inline figure
• installation routine to be updated
• technodata.rst has a few links not displayed properl(inputs-agents and existing_capacity)
• inputs_csv.rst has not updated links ('inputs/timeslices' ad 'inputs/regions')
• docs/add-solar file seems redundant
• API is not built

[alexanderkell]

Thanks @alexanderkell, regarding this:
Could you explain what you mean by "overview.rst: foresight could be an inline figure"? It looks okay to me on https://muse-docs.readthedocs.io/en/latest/overview.html#foresight-in-muse

I was wondering whether the figure can be on the same page rather than on a separate link (but it is a minor question)

[alexanderkell]

@sgiarols, how do you view the documentation as built with GitHub actions? The API builds locally for me.

[sgiarols]

@sgiarols, how do you view the documentation as built with GitHub actions? The API builds locally for me.

On readthedocs, the links are not working.