polish 18

[dglazkov]

• Carry over custom describer when pasting a graph.
• Make relative module/graph URLs droppable.
• Pass outerGraph correctly to make module-based types runnable again.
• Teach GraphBasedNodeHandler to describe module types.
• Supply proper loading context when retrieving component types.
• Supply proper loader context when retrieving type metadata.
• Allow deleting star edges.
• Make ad hoc wiring work again.
• docs(changeset): A cornucopia of fixes and polish

[changeset-bot]

🦋 Changeset detected

Latest commit: ad2d0a9

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 6 packages

Name	Type
@breadboard-ai/visual-editor	Patch
@google-labs/breadboard	Patch
@breadboard-ai/shared-ui	Patch
@google-labs/breadboard-cli	Patch
@breadboard-ai/bbrt	Patch
@google-labs/breadboard-website	Patch

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