Update plugin display copy

[vincentmvdm]

Tip

🎬 Watch the walkthrough: Update plugin display names and descriptions

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Summary

• Add Cursor and Claude Code plugin displayName metadata so the plugins can render as Mainframe while retaining the lowercase identifiers.
• Preserve existing Codex displayName metadata in the Codex plugin and marketplace interface.
• Keep the original short description for single-description hosts and shared brief metadata.
• Use the new marketing copy as Codex interface.longDescription, with the original copy as interface.shortDescription.
• Update manifest tests to assert the display names and short/long description placement.

Testing

• bun run verify

  

[vincentmvdm]

@cursor review

[cursor]

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