CI/CD - Build, Package release the application for macOS

[sammcj]

• [x] Create build Github Actions workflows
  • [x] ARM64
  • [x] Intel x64
• [x] Package the application for macOS
• [x] Publish package as a Github release
• [ ] #33

Can then feed into https://github.com/ai-qol-things/rusty-ollama/issues/13

[sammcj]

Builds on Github Actions are "working" - but for some reason the ARM64 builds are actually intel x64 :/

[sammcj]

it worken! 🕺