ci: migrate Read the Docs configuration to use uv

Migrates the Read the Docs build from pip to uv for faster and more reliable
dependency installation. This follows the official Read the Docs documentation
for uv integration.

Changes:
- Added pre_create_environment step to install uv via asdf
- Added create_environment step to create venv with uv
- Replaced pip install commands with 'uv sync --frozen --group docs'
- Set UV_PROJECT_ENVIRONMENT to use Read the Docs virtualenv path

Benefits:
- Faster dependency resolution and installation
- Better workspace support (handles vcs-versioning dependency correctly)
- Respects uv.lock for reproducible builds with --frozen flag
- Consistent with local development and CI workflows

Reference: https://docs.readthedocs.com/platform/stable/build-customization.html#install-dependencies-with-uv

Author: RonnyPfannschmidt

.readthedocs.yaml

@@ -3,13 +3,16 @@ 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 "${READTHEDOCS_VIRTUALENV_PATH}"
     install:
-      - pip install -U pip  # Official recommended way
-      - pip install .
-      - pip install --group docs
+      - UV_PROJECT_ENVIRONMENT="${READTHEDOCS_VIRTUALENV_PATH}" uv sync --frozen --group docs