Display custom metadata in registry info text output

[JAORMX]

Summary

• Add display of custom_metadata field in text format output for thv registry info <server> command
• Custom metadata was previously only shown when using --format json
• Adds a "Custom Metadata:" section after Tags in the text output

Test plan

• Build passes
• Lint passes
• Unit tests pass
• Manually tested with thv registry info atlassian-remote which shows custom metadata

Example output

Tags: remote, atlassian, jira, confluence, compass, oauth, project-management, collaboration, documentation, beta Custom Metadata: author: Atlassian homepage: https://www.atlassian.com/platform/remote-mcp-server Example Command: thv run atlassian-remote 

Fixes #1934

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 56.68%. Comparing base (a5ff43f) to head (8df4534).
⚠️ Report is 6 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@ ## main #2871 +/- ## ========================================== + Coverage 56.66% 56.68% +0.02%  ========================================== Files 322 322 Lines 31279 31279 ========================================== + Hits 17723 17731 +8  + Misses 12038 12026 -12  - Partials 1518 1522 +4 

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