Add track colors in Character.yaml

[AnAndroNerd]

Adds the ability to read track colors out of the Character.yaml, meant for making the track color match the character's color.

[overdramatic]

the yaml is deserialized using UnderscoredNamingCovention
try doing this:

VoicebankConfig.cs - lines 38-44

public class TrackColor {
    public string ColorName { get; set; } = string.Empty;
    public string AccentColor { get; set; } = string.Empty;
    public string AccentColorDark { get; set; } = string.Empty; // Pressed
    public string AccentColorLight { get; set; } = string.Empty; // PointerOver
    public string AccentColorCenterKey { get; set; } = string.Empty; // Keyboard
}

ThemeManager.cs - line 92

var appTrackColor = new TrackColor(Colors[i].ColorName,

character.yaml

track_color:
- color_name: Default 
  accent_color: "#ffc0cb"
  accent_color_dark: "#ffc0cb"
  accent_color_light: "#ffc0cb"
  accent_color_center_key: "#ffc0cb"