[Feature request] Pressure Sensitivity via SDL Handler

[ItsLaguna]

Quick summary

SDL supports pressure sensitivity for DS2 and DS3, but right now simply choosing SDL as handler doesn't do anything. PCSX2 has a way of allowing this by editing one of the .ini files and adding certain lines to make it work.

I could've opened this a while ago but was waiting for SDL3 to be here as there was an issue where pressure sensitivity wasn't allowed while using the controller on Bluetooth.

Details

It'd be a nice to have and would serve as an alternative for the DS3 handler as it currently can crash the emulator when the controller is disconnected.