Interface improvements and bug fixes

• Update to Gnome 49
• Added a donation bar when starting the program for the first time in the system (can be disabled by creating a file during installation: ~/.config/.mangojuice)
• Improved graphical display of profiles
• Improved interface style
• Added the ability to add multiple variables using ","
• An improvement in vkbasalt is available for AppImage and the native package: the ability to select reshaders has been added. Vaddum has currently prepared a selection of reshaders that can be downloaded from the release
• Other improvements