chore: replace pysdl2 with PySDL3 for SDL3 sensor support

SDL3 includes a dedicated 8BitDo HIDAPI driver with native gyro/accel sensor support, which SDL2 lacked.

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-opencode)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

pyproject.toml

@@ -11,7 +11,7 @@ requires-python = ">=3.9"
 authors = [{ name = "Switch Pico Maintainers" }]
 dependencies = [
     "pyserial",
-    "pysdl2",
+    "PySDL3",
     "rich",
 ]