feat: add openboardview package

[officialasishkumar]

Summary

• Add an openboardview package definition using upstream GitHub Releases.
• Select the amd64 .deb asset published by OpenBoardView.
• Add openboardview to the main manifest.

Validation

• Ran bash -n 01-main/packages/openboardview.
• Confirmed the definition resolves the latest amd64 .deb URL and published version from GitHub release JSON.
• Downloaded the current amd64 .deb and confirmed Package: openboardview with dpkg-deb -f.

Closes #1752

[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Auto-approved: Isolated addition of a new package definition following established patterns with no impact on core system logic.}