smarter changelog

[Hona]

No description provided.

[Copilot]

Pull request overview

Updates the changelog generation flow to produce a structured “raw” changelog (commit range + grouping + contributor block) and then generate UPCOMING_CHANGELOG.md via the opencode changelog command, with script/changelog.ts acting as a safer wrapper.

Changes:

• Switch release/version automation to call bun script/changelog.ts instead of directly invoking opencode run --command changelog.
• Add script/raw-changelog.ts to generate structured changelog input (commits grouped into release sections + contributor thanks).
• Rewrite script/changelog.ts into a wrapper that backs up/restores UPCOMING_CHANGELOG.md and runs the opencode changelog command; update the opencode command prompt to consume raw-changelog output.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 4 comments.

File	Description
script/version.ts	Uses the new wrapper script to generate UPCOMING_CHANGELOG.md during release/version automation.
script/raw-changelog.ts	New script that builds the structured changelog input used by the opencode command.
script/changelog.ts	Refactored into a wrapper around opencode run --command changelog, with backup/restore and quiet/print options.
.opencode/command/changelog.md	Updates the prompt and switches input generation to bun script/raw-changelog.ts.

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[Hona]

/review

[github-actions]

lgtm