fix: add --version option to Click CLI group

- Added @click.version_option decorator to main() in commands.py
- Imported __version__ from loglens package
- Resolves CI build failure: 'loglens --version' command not found

loglens/cli/__init__.py

@@ -1,6 +1,3 @@
-"""CLI package."""
+from loglens.cli.commands import main
 
-from loglens.cli.main import main
-from loglens.cli.commands import analyze, watch, report
-
-__all__ = ["main", "analyze", "watch", "report"]
+__all__ = ["main"]