Add release download stats workflow

[eonist]

Summary

Adds a GitHub Actions workflow that tracks and reports release asset download counts.

What it does

• Runs daily at 02:00 UTC (configurable via schedule)
• Can be triggered manually via workflow_dispatch
• Uses gh api to query the GitHub Releases API for all releases
• Aggregates download counts across all assets
• Outputs both total downloads and per-release breakdowns to the workflow summary

Benefits

• Track adoption trends across releases
• Understand which platforms are most popular (Linux x64/arm64, macOS, Windows)
• Validate impact of new features
• Historical data via daily snapshots in workflow runs

Implementation

• Uses GitHub CLI (gh api) with built-in authentication
• Requires no secrets beyond the default GITHUB_TOKEN
• Follows GitHub Actions best practices for scheduled workflows
• Output appears in the workflow run summary for easy access

Related discussion about measuring GitHub release downloads and tracking distribution metrics.