Adding Sphinx for Documentation

[Lementknight]

I am currently working on integrating Sphinx, so that we can facilitate better documentation building.

[mtreinish]

Once you apply this change I think this is ready to go for a default config. There isn't any content yet but we can add that later (along with a ci config to build documentation on each commit).

diff --git a/tox.ini b/tox.ini
index 95ed6e7..3e3e8b7 100644
--- a/tox.ini
+++ b/tox.ini
@@ -34,5 +34,8 @@ deps =
 commands = black {posargs} red_queen/

 [testenv:docs]
+deps =
+    qiskit_sphinx_theme
+    -r{toxinidir}/requirements.txt
 commands =
   sphinx-build -b html {posargs} docs/ docs/_build/html

[Lementknight]

Where do I make this change?