Upgrade to or support building with Qt 6

[hassanelsherbiny]

Explain the Feature/Enhancement

OBS currently supports Qt 5 and Qt 6 on their repo. They're aiming to get a beta Qt 6 build out in the next month and a final release in August. Plugins built against Qt 5 will not work with OBS Qt 6 so they'll either need to move to Qt 6 or support both. More details here obsproject/obs-studio#6481

What makes this feature/enhancement useful for StreamFX and its users?

Mainly future compatibility with OBS.

Qt 6's main benefit is it supports Apples M1 chips natively. In Qt 5 OBS was running via rosetta which has a fairly significant performance impact.

Checklist

• I am offering a monetary bounty/reward for the implementation of this Feature/Enhancement.
• There is no other way to currently do this in StreamFX or OBS Studio.

Any additional Information we need to know?

No response