Add quick-start help command

scimesh/workloads/__init__.py

@@ -3,11 +3,13 @@
 from __future__ import annotations
 
 from scimesh.core.registry import WorkloadRegistry
+from scimesh.workloads.help import HelpWorkload
 from scimesh.workloads.similarity_graph import SimilarityGraphWorkload
 from scimesh.workloads.similarity_search import SimilaritySearchWorkload
 
 
 def register_workloads(registry: WorkloadRegistry) -> None:
     """Register built-in workloads in one place, outside the main CLI."""
+    registry.register(HelpWorkload())
     registry.register(SimilaritySearchWorkload())
     registry.register(SimilarityGraphWorkload())