[CI] GitHub Actions "release" workflow

[MNThomson]

Automatically publish release binaries on version bump

Closes: #6

This CI workflow will run on any push to master:

• Build Step

  • Build binaries for Linux, Windows, & MacOS
  • Upload the binaries

• Release step

  • Download all previous binaries
  • Publish release with binaries if top level Cargo.toml version changes

Future work

@ThePrimeagen You mentioned install scripts, so I'll leave that for you to figure out, something like this could work

wget $(curl -sL https://api.github.com/repos/ThePrimeagen/htmx-lsp/releases/latest | jq -r ".assets[].browser_download_url" | grep "htmx-lsp-linux-x64")

[MNThomson]

This is an exploratory PR, not sure if this is the direction you are thinking.
Additionally, I should probably remove this being triggered on every PR run (but the green checkmarks look pretty for now)

[ThePrimeagen]

this is incredible. let me review quickly

[ThePrimeagen]

remember @MNThomson you have merge privs :)

if you find my review slow, you can merge if you are confident

[ThePrimeagen]

i think this looks great (though i am pretty terrible at github ci. i live in jenkins)

[MNThomson]

Bleck, I'm so sorry for your loss (of having to use Jenkins)