console.py imported click at module level, but click was only declared under the tutorials optional group. A plain pip install graphframes-py would install the graphframes console script that immediately fails with ModuleNotFoundError: click.

What changes were proposed in this pull request?

• python/pyproject.toml: Added [tool.poetry.dependencies] section with click = "^8.1.8" as a core runtime dependency; removed click from [tool.poetry.group.tutorials.dependencies].
• python/graphframes/console.py: Moved from graphframes.tutorials import download inside main() as a lazy import, so the optional tutorial packages (py7zr, requests) are not loaded at import time — only when the CLI is actually invoked.

Why are the changes needed?

The graphframes console script is always installed via [tool.poetry.scripts], so click must be a core dependency, not an optional one. Lazy-importing the tutorials module avoids pulling in heavy optional deps (py7zr, requests) for users who haven't installed the tutorials extra.