docs: Improve 5.0.x <-> main branch doc linkrot

This improves, but does not entirely fix, the broken links that result
from the autoapi change.  It fixes module-level links, but class links
still do not work (e.g., /shared-bindings/displayio/Palette.html (5.0.x)
is now just /shared-bindings/displayio/#displayio.Palette).

.gitignore

@@ -53,6 +53,7 @@ _build
 ######################
 genrst/
 /autoapi/
+/shared-bindings/**/*.rst
 
 # ctags and similar
 ###################

conf.py

@@ -79,6 +79,7 @@ autoapi_add_toctree_entry = False
 autoapi_options = ['members', 'undoc-members', 'private-members', 'show-inheritance', 'special-members', 'show-module-summary']
 autoapi_template_dir = 'docs/autoapi/templates'
 autoapi_python_use_implicit_namespaces = True
+autoapi_root = "shared-bindings"
 
 # The encoding of source files.
 #source_encoding = 'utf-8-sig'

ports/atmel-samd/README.rst

@@ -21,4 +21,4 @@ Port Specific modules
 ---------------------
 
 .. toctree::
-    ../../autoapi/samd/index
+    ../../shared-bindings/samd/index

shared-bindings/index.rst

@@ -19,5 +19,5 @@ Modules
     :glob:
     :maxdepth: 2
 
-    ../autoapi/*/index
+    ../shared-bindings/*/index
     help