pythonGH-121970: Rewrite the C-API annotations extension (python#121985)

Co-authored-by: Petr Viktorin <encukou@gmail.com>
(cherry picked from commit 22c9d9c)

Doc/.ruff.toml

@@ -5,7 +5,6 @@ line-length = 79
 extend-exclude = [
     "includes/*",
     # Temporary exclusions:
-    "tools/extensions/c_annotations.py",
     "tools/extensions/escape4chm.py",
     "tools/extensions/patchlevel.py",
     "tools/extensions/pyspecific.py",

Doc/c-api/module.rst

@@ -342,7 +342,8 @@ The available slot types are:
    The *value* pointer of this slot must point to a function of the signature:
 
    .. c:function:: PyObject* create_module(PyObject *spec, PyModuleDef *def)
-      :noindex:
+      :no-index-entry:
+      :no-contents-entry:
 
    The function receives a :py:class:`~importlib.machinery.ModuleSpec`
    instance, as defined in :PEP:`451`, and the module definition.
@@ -377,7 +378,8 @@ The available slot types are:
    The signature of the function is:
 
    .. c:function:: int exec_module(PyObject* module)
-      :noindex:
+      :no-index-entry:
+      :no-contents-entry:
 
    If multiple ``Py_mod_exec`` slots are specified, they are processed in the
    order they appear in the *m_slots* array.

Doc/conf.py

@@ -589,14 +589,16 @@
 }
 extlinks_detect_hardcoded_links = True
 
-# Options for extensions
-# ----------------------
+# Options for c_annotations
+# -------------------------
 
 # Relative filename of the data files
 refcount_file = 'data/refcounts.dat'
 stable_abi_file = 'data/stable_abi.dat'
 
-# sphinxext-opengraph config
+# Options for sphinxext-opengraph
+# -------------------------------
+
 ogp_site_url = 'https://docs.python.org/3/'
 ogp_site_name = 'Python documentation'
 ogp_image = '_static/og-image.png'