#915 - Refactored documentation and included APi docs, dependencies.

- make files now re-build autosummary and deps file.
- Added typer and platformdirs to deps in pyproject.toml.
- Made root_is_pure = True in setup.py as platform/python specific wheels don't need to be built but the option is there should we need to.
-
Added an e2e test for primaite.main.run func.

docs/api.rst

@@ -0,0 +1,16 @@
+..
+   DO NOT DELETE THIS FILE! It contains the all-important `.. autosummary::` directive with `:recursive:` option, without
+   which API documentation wouldn't get extracted from docstrings by the `sphinx.ext.autosummary` engine. It is hidden
+   (not declared in any toctree) to remove an unnecessary intermediate page; index.rst instead points directly to the
+   package page. DO NOT REMOVE THIS FILE!
+
+    Credit to https://github.com/JamesALeedham/Sphinx-Autosummary-Recursion for the custom templates.
+..
+
+.. autosummary::
+   :toctree: source/_autosummary
+   :template: custom-module-template.rst
+   :recursive:
+
+   primaite
+   tests