Minimal qt6 support

[fibur]

Changes for Qt6 adaptation.

Note: tested only on Ubuntu 22.04, with Qt 6.5.3

Qt 6 porting
I did not have time to test that with other platforms. I also didn't check all possible functionalities, as I was mainly focused on adapting for personal project, in which I only needed plain screen casting + input.

I can confirm scrcpy works, dialog is also displayed and is fully responsive. I am not sure if audio works.

simplescreenrecorder-2025-01-06_20.51.43.mp4

[barry-ran]

need update QtScrcpyCore in this pr

[barry-ran]

Please fix the compilation error of GitHub action, even on Ubuntu, it still fails to compile

[fibur]

need update QtScrcpyCore in this pr

I think it's done already

fibur@fibur-MS-7D93:~/QtScrcpy/QtScrcpy/QtScrcpyCore$ git log --oneline 
4ca295f (HEAD, origin/qt6) feat: Adapt to Qt6

Please fix the compilation error of GitHub action, even on Ubuntu, it still fails to compile

Fixed GitHub Actions - everything should compile now. Note that Qt6 dropped support for x86, so removed relevant MSVC x86 build from github actions. Also had to slightly modify how version is interpreted as it caused failure on MSVC

[barry-ran]

Thank you very much for your contribution. The code style is also very rigorous

[barry-ran]

Can you help improve the Linux packaging script? Building a program that can be directly executed similar to Windows and Mac, I am not familiar with Linux packaging