docs: use starbase readthedocs

.readthedocs.yaml

@@ -1,40 +1,27 @@
 # .readthedocs.yaml
 # Read the Docs configuration file
 # See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
----
+
 # Required
 version: 2
 
-build:
-  os: ubuntu-22.04
-  tools:
-    python: "3.10"
-  jobs:
-    post_checkout:
-      - git submodule update --init -- docs/sphinx-starter-pack
-      - make preparedocs
-    post_install:
-      - ./tools/mkdoclinks.sh
-
 # Build documentation in the docs/ directory with Sphinx
 sphinx:
   configuration: docs/conf.py
-  builder: dirhtml
-  fail_on_warning: true
-
-# Build documentation with MkDocs
-# mkdocs:
-#  configuration: mkdocs.yml
 
 # Optionally build your docs in additional formats such as PDF
 formats:
   - pdf
+  - epub
+
+build:
+  os: ubuntu-22.04
+  tools:
+    python: "3"
 
-# Optionally set the version of Python
-# and requirements required to build your docs
 python:
   install:
     - method: pip
       path: .
       extra_requirements:
-        - docs
+        - docs