better GB GBC GBA Overlays

[Benman2785]

Checklist

• [X] I am reporting a bug in the Onion OS - Any issues with the closed source frontend (MainUI), or RetroArch or any of the cores should be directed to their respective repositories
• [X] I have reviewed the Onion Docs and did not find the answer
• [X] I have searched the existing (open and closed) issues to ensure I do not log a duplicate

Onions OS Version

4.3.0

Miyoo Firmware Version

202303262339

Provide a clear and concise description of the issue

i modded GB GBC and GBA overlays so they look better and are pixel-accurate (actually the GBA overlay isnt - but its not possible otherwise)

Steps to Reproduce

1. make backups of org *.png overlays
2. copy my overlays over
3. enjoy

Provide any additional context or information that may help us investigate your issue

[XK9274]

Can you also PR this (In a separate PR to your german NDS lang)