Koi - 0.4 -- Minor & Major of both visual and under-the-hood changes/improvements

Update to the latest stable upstream version - 0.4

What's Changed

• Minor & Major of both visual and under-the-hood changes/improvements; General improvements, changes to formatting and overall visual adjustments by @MartinVonReichenberg . . .

• Featuring: Refactor plugins; updated plugins, paths & more; Changed/Removed unnecessities by @ItachiSan in #101

• Added option to run Bash scripts at Light/Dark theme shift by @passportmidi in #96

New Contributors

• @passportmidi made their first contribution in #96
• @ItachiSan made their first contribution in #101

Full Changelog: 0.3.1...0.4

TODO:

• Implement + - OFFSET in minutes . . .
• Enable DBus service integration with an .XML file
• Re-create GUI in QT Creator / QT Designer version 6 instead 5 from scratch
• Help with creating DEBIAN/KDE NEON/UBUNTU packages . . .
• Compile & distribute Koi using Flatpak