Add installation instructions to usage documentation page

doc/documentation/usage/installation.rst

@@ -2,27 +2,62 @@
 Installation
 ============
 
+Requirements
+------------
 
-Create an environment
+WhoBPyT requires **Python 3.9 or higher**.
+
+Quick Install (pip)
+-------------------
+
+The easiest way to install WhoBPyT is via pip:
+
+.. code::
+
+   $ pip install whobpyt
+
+
+Install from Source
+-------------------
+
+To install the latest development version directly from GitHub, first create and activate a conda environment:
 
 .. code::
 
    $ conda create -n "whobpyt" git pip python=3.9
    $ conda activate whobpyt
 
+Clone the repository and install:
+
+.. code::
+
+   $ git clone https://github.com/GriffithsLab/whobpyt
+   $ cd whobpyt
+   $ pip install .
 
-Clone latest version from github
+For an editable (development) install that reflects local code changes immediately:
 
 .. code::
 
-    $ git clone https://github.com/GriffithsLab/whobpyt
-
-
-Now go to the cloned folder and install manually 
+   $ pip install -e .
+
+
+Optional: Development and Documentation Dependencies
+-----------------------------------------------------
+
+To install additional dependencies needed for running tests or building the documentation:
 
 .. code::
 
-   $ cd whobpyt
-   $ pip install -r requirements.txt
-   $ pip install -e .
+   $ pip install -r requirements.txt
+
+
+Verifying the Installation
+--------------------------
+
+After installation, you can verify that WhoBPyT is correctly installed by running the following in a Python session:
+
+.. code:: python
 
+   import whobpyt
+   print(whobpyt.__version__)