Merge GUI changes and other stuff

[superyu1337]

Changes:

• Slight UI overhaul. (Still imperfect, will test around with new layouts)
• Most buttons are now very cool icons! 🥳 (Need to find fitting icons for loading and removing favorites)
• The aforementioned buttons have tooltips (hover text)
• Added favorites feature to GUI.
• Added reset button, allows for injecting multiple times without app restart.
• Added darkmode toggle and made darkmode the default. (Maybe autodetect dark/light theme from OS?)
• Symbols are now stripped on the release profile by default, small binary sizes are cool. 😎

Important notes:

• Data directory is changed from <data_dir>/favorites to <data_dir>/switcheroo/favorites/ (Makes more sense, atleast on my linux system, don't know how the structure on windows and MacOS is.
• There is some commented out code from my first attempt on the payload manager (which failed lol)

[budde25]

Looks great! Thanks for the pr! I noticed that favorites directory mistake too just the other day, thanks for the fix on that too.