[doc][api][info] Provide machine-independant docstrings.

doc/api/info.deps.rst

@@ -3,5 +3,9 @@ pyxu.info.deps
 
 .. automodule:: pyxu.info.deps
    :members:
+   :exclude-members: CUPY_ENABLED
    :undoc-members:
    :show-inheritance:
+
+   .. autodata:: CUPY_ENABLED
+      :no-value:

doc/api/info.ptype.rst

@@ -1,4 +1,52 @@
 pyxu.info.ptype
 ===============
 
+.. [Sepand, 2023.09.15]
+.. `pyxu.info.ptype` contains alias types for Python type checkers.  When auto-documented via Sphinx, alias types
+.. contain "alias of ..." as part of their docstring, which depends on the machine config.  (Was unable to remove them
+.. via Sphinx's `autodoc-process-docstring` event.) To avoid machine-dependant outputs in HTML docs, we provide custom
+.. machine-agnostic documentation for some aliases as required. Provided descriptions match those given as comments in
+.. `pyxu.info.ptype`.
+
+
 .. automodule:: pyxu.info.ptype
+   :exclude-members: NDArray, ArrayModule, SparseArray, SparseModule, OpT, Property, SolverT, SolverM, Real, DType
+
+   .. class:: NDArray
+
+      Supported dense array types.
+
+   .. class:: ArrayModule
+
+      Supported dense array modules.
+
+   .. class:: SparseArray
+
+      Supported sparse array types.
+
+   .. class:: SparseModule
+
+      Supported sparse array modules.
+
+   .. class:: OpT
+
+      Top-level abstract :py:class:`~pyxu.abc.Operator` interface exposed to users.
+
+   .. autodata:: Property
+      :no-value:
+
+   .. class:: SolverT
+
+      Top-level abstract :py:class:`~pyxu.abc.Solver` interface exposed to users.
+
+   .. class:: SolverM
+
+      Solver run-mode(s).
+
+   .. class:: Real
+
+      Alias of :py:class:`numbers.Real`.
+
+   .. data:: DType
+
+      :py:attr:`~pyxu.info.ptype.NDArray` dtype specifier.