Linux review

[bdlukaa]

• Added deep-linking support on Linux;
• use media_kit from git:
  • fixes Fedora Build (fix: (maybe) Adjust cmake options to have them not try to define pthread media-kit/media-kit#637, App does not open on Fedora 38 #159);
• added safe loading to storage. If it fails, the app does not stop from loading;
• removed mimalloc. It was causing crashing;
• carefully create multiple players on startup. Creating a lot of them at once may not perform well on some devices;
• fix: downloads now correctly show on the downloads tab;
• possibility to drag the window while the app is loading (splash screen);
• updated the UI to behave better on Linux. Updates include new window buttons (titlebar_buttons), centered title for sub-screens and theme review.