DOC: Creating top-level development section, and moving pages inside (#24691)

Author: datapythonista

doc/source/contributing.rst renamed to doc/source/development/contributing.rst

@@ -698,7 +698,7 @@ A pull-request will be considered for merging when you have an all 'green' build
 then you will get a red 'X', where you can click through to see the individual failed tests.
 This is an example of a green build.
 
-.. image:: _static/ci.png
+.. image:: ../_static/ci.png
 
 .. note::
 

doc/source/contributing_docstring.rst renamed to doc/source/development/contributing_docstring.rst

@@ -0,0 +1,15 @@
+{{ header }}
+
+.. _development:
+
+===========
+Development
+===========
+
+.. toctree::
+    :maxdepth: 2
+
+    contributing
+    internals
+    extending
+    developer

doc/source/developer.rst renamed to doc/source/development/developer.rst

@@ -124,7 +124,6 @@ See the package overview for more detail about what's in the library.
     {% if not single_doc -%}
     What's New <whatsnew/v0.24.0>
     install
-    contributing
     overview
     10min
     tutorials
@@ -143,8 +142,6 @@ See the package overview for more detail about what's in the library.
     api/index
     {% endif -%}
     {% if not single_doc -%}
-    developer
-    internals
-    extending
+    development/index
     whatsnew/index
     {% endif -%}

doc/source/extending.rst renamed to doc/source/development/extending.rst

@@ -47,7 +47,7 @@ ignore = E402,  # module level import not at top of file
 
 exclude =
     doc/source/basics.rst
-    doc/source/contributing_docstring.rst
+    doc/source/development/contributing_docstring.rst
 
 
 [yapf]