Add more install docs

docs/narr/install/pkg.rst

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+
+Package Installation
+====================
+
+To install the :term:`package` into your :term:`virtual environment`:
+
+.. code-block:: sh
+
+   pip install WuttJamaican
+
+Please also see
+:doc:`packaging:guides/installing-using-pip-and-virtual-environments`
+in upstream docs.
+
+
+Sanity Check
+------------
+
+Confirm that worked with:
+
+.. command-output:: wutta --version