Closes #3017: Add documentation for our random number generation (#3044)

This PR (closes #3017) adds docs for our new random number generation using Generators.

Co-authored-by: Tess Hayes <stress-tess@users.noreply.github.com>

pydoc/usage.rst

@@ -17,5 +17,6 @@ Usage Guide
  usage/groupby
  usage/strings
  usage/categorical
+ usage/random
  usage/segarray
  usage/arrayview

pydoc/usage/random.rst

@@ -0,0 +1,34 @@
+***********
+Random in Arkouda
+***********
+Pseudo random number generation in Arkouda is modeled after numpy.
+Just like in numpy the preferred way to access the random functionality in arkouda is via ``Generator`` objects.
+If a ``Generator`` is initialized with a seed, the stream of random numbers it produces can be reproduced
+by a new ``Generator`` with the same seed. This reproducibility is not guaranteed across releases.
+
+.. autoclass:: arkouda.random.Generator
+
+Creation
+=========
+To create a ``Generator`` use the ``default_rng`` constructor
+
+.. autofunction:: arkouda.random.default_rng
+
+Features
+==========
+
+integers
+---------
+.. autofunction:: arkouda.random.Generator.integers
+
+random
+---------
+.. autofunction:: arkouda.random.Generator.random
+
+standard_normal
+---------
+.. autofunction:: arkouda.random.Generator.standard_normal
+
+uniform
+---------
+.. autofunction:: arkouda.random.Generator.uniform