Lataa Crushee 2.0.0

- An all-new look!
- Animations and a new layout have been implemented to (hopefully) make the _add->crush->save_ workflow clearer for users.
- Unfortunately, dark mode is gone for now.
It'll be back, I promise!
- Crushee starts up way, way faster.
- Crushing is now faster, too!
- Crushing algorithms have been tweaked to better balance quality vs size.
- New optimization libraries have been implemented to better shave off bytes.
- GIFs and SVGs can now be optimized.
The color count on GIFs can be altered when crushed.
- You can now convert files to PNG.
- PNGs now resize.
I knew something didn't seem right with those file sizes...
- Crushing large numbers of files no longer locks up the app.
I've tested with up to 20k files and it still worked, though a bit slowly.
- Crushed JPEGs weren't always readable on Windows.
Now they are.
- Status messages should no longer get stuck.
So if you're seeing a message for a while, it's actually crunching numbers.
- Everything is more stable in general.
Especially on Mac.