Pain Flash Intensity Slider

[YaraaraY]

About the PR

This PR adds a slider for the intensity of the pain flash overlay, for people who have issues with the red flashing when taking damage.

Why / Balance

I think EmoGarbage is gonna kill me
This is better than simply tying it to Reduced Motion, and allows people to decide just how intense they want the flashing to be.

Technical details

Added funkystation.pain_flash_intensity as a cvar, and an slider in the accessibility tab that changes it.
Edited ESPainFlashSystem and ESPainFlashOverlay to respect the cvar.

Test plan

Go get smacked around with the slider on different levels.

Media

Requirements

• I have read and am following the Macrocosm Pull Request Conventions.
• I have tested this pull request and written instructions on how to test it
• I have added media to this PR or it does not require an in-game showcase.
• If I am porting something, I have done my best to respect the appropriate licenses associated with the presented changes.

License

MIT

Changelog

🆑 AraiMaia

• add: Added a slider to define the intensity of the red pain flashes.