Black screen on boot on ARM64 MacOS

[j0lol]

• x64 build works fine
• arm64 build shows a logo, then fades to black screen on boot, audio keeps playing

X64 Logs

% ./Celeste64-v1-2/Celeste64
Celeste 64 v.1.1.1
Foster: v0.1.18
Platform: Darwin 23.3.0 Darwin Kernel Version 23.3.0: Wed Dec 20 21:30:27 PST 2023; root:xnu-10002.81.5~7/RELEASE_ARM64_T8103 (Arm64)
Framework: .NET 8.0.1
SDL: v2.30.0
OpenGL: v4.1 Metal - 88, Apple M1
FMOD Bindings: v20218
FMOD: v20218
WARNING: Output of vertex shader 'v_col' not read by fragment shader
WARNING: Output of vertex shader 'v_type' not read by fragment shader

WARNING: Output of vertex shader 'v_color' not read by fragment shader

Loaded Assets in 1324ms

ARM64 Logs

 % ./Celeste64-v1/Celeste64
Celeste 64 v.1.1.1
Foster: v0.1.18
Platform: Darwin 23.3.0 Darwin Kernel Version 23.3.0: Wed Dec 20 21:30:27 PST 2023; root:xnu-10002.81.5~7/RELEASE_ARM64_T8103 (Arm64)
Framework: .NET 8.0.1
SDL: v2.30.0
OpenGL: v4.1 Metal - 88, Apple M1
FMOD Bindings: v20218
FMOD: v20218
WARNING: Output of vertex shader 'v_col' not read by fragment shader
WARNING: Output of vertex shader 'v_type' not read by fragment shader

WARNING: Output of vertex shader 'v_color' not read by fragment shader

Loaded Assets in 748ms

[NoelFB]

Merging this into #70 as it happens on Linux and MacOS