docs: use datajoint-python pre/v2.0 branch for documentation

- CI now checks out pre/v2.0 branch instead of default branch
- Updated README with instructions to clone pre/v2.0 for local development
- Ensures documentation is built against pre-release 2.0 features

Author: dimitri-yatsenko

.github/workflows/development.yml

@@ -16,6 +16,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           repository: datajoint/datajoint-python
+          ref: pre/v2.0
           path: datajoint-python
       - name: Compile docs static artifacts
         run: |

README.md

@@ -154,10 +154,15 @@ dependencies needed to build documentation and execute tutorial notebooks.
 ### Start the Environment
 
 ```bash
-# Clone the repository
+# Clone the documentation repository
 git clone https://github.com/datajoint/datajoint-docs.git
 cd datajoint-docs
 
+# Clone datajoint-python pre-release branch (required for API docs)
+cd ..
+git clone -b pre/v2.0 https://github.com/datajoint/datajoint-python.git
+cd datajoint-docs
+
 # Start all services (MySQL, MinIO, docs server)
 MODE="LIVE" docker compose up --build
 ```