Refactor into modular molecular workloads

scimesh/workloads/__init__.py

@@ -0,0 +1,13 @@
+"""Built-in SciMesh workloads."""
+
+from __future__ import annotations
+
+from scimesh.core.registry import WorkloadRegistry
+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(SimilaritySearchWorkload())
+    registry.register(SimilarityGraphWorkload())