feat(update): Add update command

[pthurlow]

No description provided.

[sentry]

Codecov Report

❌ Patch coverage is 12.35955% with 156 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/update.rs	10.91%	155 Missing ⚠️
src/main.rs	75.00%	1 Missing ⚠️

📢 Thoughts on this report? Let us know!

[claude]

Review

Blocking Issues

• src/update.rs:137 and src/update.rs:154 — the Homebrew formula is named cli in the hotdata-dev/tap tap (per dist-workspace.toml formula = "cli" and the README install command). brew upgrade hotdata will fail with Error: No formula or cask found for hotdata, so the user-facing guidance directs Homebrew users to a broken command.

Action Required

Replace brew upgrade hotdata with brew upgrade hotdata-dev/tap/cli in both the update-available notice (line 137) and the hotdata update Homebrew message (line 154) so the suggestion matches the install command in the README.

Two non-blocking items left inline (temp dir predictability, optional checksum verification).

[claude]

All prior blocking issues resolved. The Homebrew formula is now sourced from [package.metadata.hotdata] via build.rs so the README, dist config, and binary all agree. Temp-dir extraction now uses tempfile::TempDir.