docs: add Busabase DSH plugin

[ranglang]

Summary

Add Busabase for DSH to the Memory category in both READMEs. It connects DSH agents to Busabase through MCP tools, approval-aware ChangeRequests, result cards, and a live record inspector.

• The plugin declares dsh.bundle.patch: ./cordis.patch.yml in its root package.json.
• One line added to each README in the matching category, alphabetically by owner/repo.
• Factual descriptions with no superlatives.
• The repository has the dsh-plugin topic.
• Official DSH packages are peer dependencies.

Validation

• node scripts/check-order.mjs — passed.
• git diff --check — passed.
• Exactly two added lines; no generated files changed.

Disclosure: I work on Busabase. This contribution was prepared with AI assistance and submitted with my authorization.