Summary

• replace deprecated RouteLayer usage with SemanticRouter in docs notebook 05 (local execution)
• update notebook 07 (multi-modal) to import SemanticRouter from the public package entrypoint
• update vision install snippet to semantic-router[vision]>=0.1.0 and remove duplicate pip install datasets

Validation

• jq empty docs/05-local-execution.ipynb
• jq empty docs/07-multi-modal.ipynb
• git diff --check

Fixes #501