ToolButton with multi-value switches

[thelastlin]

The inline schema switches on the input bar have been replaced by the SwitchOptionWindow popup(e345192). Now the toolbar buttons currently support displaying binary toggle switches via the option_styles + toggle:

# tongwenfeng.trime.yaml
tool_bar:
  ascii_mode_button: &ascii_mode_button
    foreground:
      option_styles: ["中", "En"] # 样式也可以为表，将根据 action 的 toggle 决定
      font_size: 18  # 按钮字体大小
      padding: 10
    action: Mode_switch
#...
preset_keys:
    Mode_switch: {toggle: ascii_mode, functional: false, send: Mode_switch, states: [ 中文, 西文 ]}

However, rime schemas support multi-value mutually exclusives, for instance:

yaml
switches:
  - options: [opt_a, opt_b, opt_c]
    states: ["A", "B", "C"]

These are implemented as a set of boolean options where only one is true as a time.
But these switches don't work with option_styles. Any thoughts on how to support this?