docs: Add HPR to the comparison table

[plexescor]

Summary: HPR has been added to the comparison table in the README

[greptile-apps]

Greptile Summary

Adds HPR to the README comparison table.

• Links to the HPR project.
• Documents its data ownership, GUI, sync, open-source, platform, and tracking capabilities.

Confidence Score: 5/5

The documentation-only change appears safe to merge.

The HPR entries match the existing comparison-table structure, and the reviewed evidence establishes no incorrect link, malformed row, security issue, or other actionable failure.

Important Files Changed

Filename	Overview
README.md	Adds structurally valid HPR entries to the three comparison-table sections without an identified actionable defect.

_{Reviews (1): Last reviewed commit: "remove the extra" | Re-trigger Greptile}