[ENHANCEMENT] Ability to set the Scroll Speed with modes and change it dynamically during PlayState

[Starexify]

Linked Issues

#2943

Description

This PR adds a way for the player to set their own scroll speed when playing songs.

Includes:

• A Preference Option Scroll Speed with 3 Modes:

  • Off - No Scroll Speed Change from player applied
  • Static - The scroll speed is fixed based on the player's scroll speed
  • Adaptive - The scroll speed is set based on the player's scroll speed and can be altered by song events, (ex. ScrollSpeedEvent)

• 2 new Controls with their own header for changing the scroll speed mid-song

  • Increase - Increases the strumlines and player's scroll speed by 0.1
  • Decrease - Decreases the strumlines and player's scroll speed by 0.1
    The change will affect differently the strumlines from the players based on the selected mode, Static will always be same for the strumlines/song/player scroll speed, instead Adaptive will change the current speed of the strumlines, meaning song events can alter it.

Screenshots/Videos

Example:

hidin.mov

pause.scroll.speed.mov

Preference:

Controls: