Add Linux Build/Support

[grofit]

Currently Strem only gets built for and runs on Windows, but as its all built off cross platform tech there is no real reason why it cant run on other platforms such as Linux or OSX which dotnet supports.

So it would be good if we could support Linux (and possibly OSX) and build for it as part of BAU work.

Describe the solution you'd like
Strem runs on Linux and tagged builds are created for Linux

Describe alternatives you've considered
N/A

Additional context
There will be some native functionality which will not work on Linux such as:

• Voice Recognition
• Audio Playback
• Text To Speech (TTS)

For now this can just be empty implementations to get a working build, luckily we already abstract away the native parts so it should be easy enough to support assuming Photino and 3rd party dependent libs do.

[grofit]

We have got builds working for Linux which can be found here as arfifacts:
https://github.com/strem-app/strem/actions/runs/13724164714

(To run extract the zip, give Strem execution permissions then just run Strem in terminal, i.e:

1. chmod +x ./Strem
2. ./Strem

One large problem we have noticed so far (ignoring the missing native functionality for audio related tasks) is that drag and drop does not work correctly with Photino out the box, this has been raised here tryphotino/photino.Native#152