ci: add Read the Docs config with uv

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: FBumann

.readthedocs.yaml

@@ -0,0 +1,18 @@
+version: 2
+
+mkdocs:
+  configuration: mkdocs.yml
+
+build:
+  os: ubuntu-24.04
+  tools:
+    python: "3.13"
+  jobs:
+    pre_create_environment:
+      - asdf plugin add uv
+      - asdf install uv latest
+      - asdf global uv latest
+    create_environment:
+      - uv venv "${READTHEDOCS_VIRTUALENV_PATH}"
+    install:
+      - UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --frozen --extra docs