Nintendont intentionally shuts down if an ISO is larger than the standard max GameCube ISO size (1.36GiB)

• GameCube homebrew, such as Swiss can support up to 1.90GiB 3.00GiB (thanks Extrems) ISOs
• Dolphin can support unlimited size
• There are various game mods that ship their own Nintendont version to change this limiter to a larger size

Proposal:
Make the mainline maximum size at minimum match with Swiss (3.00GiB), which allows for more compatibility with game mods that add additional content.

I'm intending to open a PR soon to do this, but am opening an issue in case there is a reason these changes have not been accepted in the past.

Update: PR opened:
#1213