Online documentation of command-line functions

[dennisbrookner]

new in this PR:

• A [docs] extra install was added to setup.cfg. Now a workflow (or human) can run pip install ".[docs]" and have the necessary things to build the website.
• Added a new page for each command-line function which looks like this:

  
  .. _initial_solution:

laue_dials.initial_solution

Introduction

.. python_string:: laue_dials.command_line.initial_solution.help_message

Basic parameters

.. phil:: laue_dials.command_line.initial_solution.working_phil :expert-level: 0 :attributes-level: 0

Full parameter definitions

.. phil:: laue_dials.command_line.initial_solution.working_phil :expert-level: 2 :attributes-level: 2

this is how `dials` does it, and it works well. The expert levels of 0 and 2 could always be fiddled with.

NOTE: `laue.sequence_to_stills` doesn't have a help string presently, so I omitted that from docs. That should presumably get added (@PrinceWalnut).

 - A more informative navbar differentiating between command-line reference and API reference
 - HTML title tab displays package name more concisely and shows the RS favicon
 - Removed the "Overview" page and moved its contents to the home page.

# What's left
It inevitably takes a little bit of finagling to get the permissions right for the action to build docs. However, actions don't really work properly on branches, so I think that has to be done after this gets merged in.

[codecov[bot]]

Codecov Report

Merging #26 (aa890da) into main (6d2ea05) will not change coverage. The diff coverage is 0.00%.

:exclamation: Current head aa890da differs from pull request most recent head d131d8a. Consider uploading reports for the commit d131d8a to get more accurate results

@@           Coverage Diff           @@
##             main      #26   +/-   ##
=======================================
  Coverage   44.12%   44.12%           
=======================================
  Files           4        4           
  Lines         281      281           
  Branches       19       19           
=======================================
  Hits          124      124           
  Misses        152      152           
  Partials        5        5           

Flag	Coverage Δ
unittests	44.12% <0.00%> (ø)

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Files Changed	Coverage Δ
src/laue_dials/__init__.py	100.00% <ø> (ø)
src/laue_dials/algorithms/laue.py	32.94% <0.00%> (ø)

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[PrinceWalnut]

@dennisbrookner looks solid to me. Could generating these be appended to the build_docs.yml workflow?

[dennisbrookner]

Yeah, I'm working on the workflow right now!

[dennisbrookner]

I finally have the workflow nearly working; it's quite the headache! I'm now at the point where I won't really be able to tell if it's working until everything lives in the main branch, so if there aren't objections, I'm going to go ahead and merge this in later today!