Huak v0.0.7-alpha.2 PoC (early)

⚠️ Disclaimer: huak is currently in its proof-of-concept (PoC) phase.

Highlights

• Sets huak activate as unsupported on windows (#302)

What's Changed

• Add windows and macos to ci-rust action by @cnpryer in #300
• Set activate command to unimplemented on windows by @cnpryer in #301
• Bump to v0.0.7-alpha.2 by @cnpryer in #304
• Update README.md by @cnpryer in #305

Full Changelog: v0.0.7-alpha.1...v0.0.7-alpha.2