fix: match package and module structure with Hist (#16)

Author: Saransh-cpp

docs/api/cuda_histogram.axis.rst

@@ -0,0 +1,7 @@
+cuda_histogram.axis package
+===========================
+
+.. automodule:: cuda_histogram.axis
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/api/cuda_histogram.hist.rst

@@ -0,0 +1,7 @@
+cuda_histogram.hist module
+==========================
+
+.. automodule:: cuda_histogram.hist
+   :members:
+   :undoc-members:
+   :show-inheritance:

docs/api/cuda_histogram.hist_tools.rst

@@ -1,10 +1,18 @@
 cuda_histogram package
 ======================
 
+Subpackages
+-----------
+
+.. toctree::
+   :maxdepth: 3
+
+   cuda_histogram.axis
+
 Submodules
 ----------
 
 .. toctree::
    :maxdepth: 3
 
-   cuda_histogram.hist_tools
+   cuda_histogram.hist

docs/api/cuda_histogram.rst

@@ -8,15 +8,13 @@
 
 from __future__ import annotations
 
-from cuda_histogram.hist_tools import Bin, Cat, Hist, Interval, StringBin
+from cuda_histogram import axis
+from cuda_histogram.hist import Hist
 
 from ._version import version as __version__
 
 __all__: list[str] = [
     "Hist",
-    "Bin",
-    "Interval",
-    "Cat",
-    "StringBin",
+    "axis",
     "__version__",
 ]