Loading state in web interface
Description
There's currently no loading indication during the ROM loading period.
This is not an issue for small <1MB ROMs, but for larger ones, this can create some confusion for the user.
Build a simple loading status with some vintage looking, taking inspiration from older 8bit games.
Implementation
You can find some inspiration in Dribble and YouTube and create a design.
Implement it at the EmuKit level.
Inspiration
