chore(release): v0.5.0

[ehs208]

Bump the version to 0.5.0 for the create_calendar release (#35).

• package.json, package-lock.json, mcpb/manifest.json, and SERVER_VERSION set to 0.5.0
• CHANGELOG.md: Unreleased entries moved under [0.5.0] - 2026-10-07

Checked locally: npm run verify passes, npm run build:mcpb builds, and the bundle answers initialize (version 0.5.0) and tools/list (21 tools, including create_calendar).

After merge, tag the merge commit v0.5.0 to publish the release.

🤖 Generated with Claude Code

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-07T11:22:05.008815Z	33c1c4b	PR opened

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