Add macOS support

[guruor]

Changes needed for #16 building on macos.

[rszyma]

1. Does macos require any dependencies? If yes please add them to readme.

2. It would be nice to add macos to CI (see https://github.com/rszyma/kanata-tray/tree/main/.github/workflows)

[guruor]

Does macos require any dependencies? If yes please add them to readme.

I did not require any dependencies so can't commit if any was pre-requisite, will have to try it on a fresh system.

It would be nice to add macos to CI (see https://github.com/rszyma/kanata-tray/tree/main/.github/workflows)

Let me try adding the workflow, it will help us determine if any dependency is required.

[rszyma]

Let me try adding the workflow, it will help us determine if any dependency is required.

There won't be any build time dependency, I rather thought about runtime dependency (look at linux dependencies in readme, these are runtime ones).

Using ldd might help https://stackoverflow.com/a/6589958/9611188. Though there's no pressure to find out the required libraries now, they can be added later to readme.

[rszyma]

Isn't it possible to cross-compile for macos from ubuntu like it's done for windows? Otherwise there would be a lot of duplication after applying your proposed changes.

[guruor]

I actually never actually built cross-platform builds before so don't have much idea about it. Though I tried running the github actions locally to build it on same ubuntu runner but faced issues related to clang and so I tried the macos runner and it was successful so did this change.

[rszyma]

I wanted to see the what's the error with cross-compiling https://github.com/rszyma/kanata-tray/actions/runs/8730443667/job/23954275895

Let's just use your solution.

Thanks for the PR :)