add button setting type

Author: Cvolton

mods/settings.md

@@ -93,6 +93,7 @@ All setting types, including custom ones if they opt-in, share a common set of b
 | `platforms` | Array | List of platforms this setting is available on, i.e. `["win", "android"]` |
 | `enable-if` | [`enable-if` Scheme](#enable-if) | A way to disable settings based on other settings; see [Enable If Schemes](#enable-if) for more |
 | `enable-if-description` | String | Human-readable description for what the `enable-if` scheme does. If not provided, Geode will try to synthesize a legible one from the `enable-if` scheme itself. However, specifying a custom description is heavily recommended if you use saved values, or have more complex schemes |
+| `button` | | Adds a button, presses can be listened to using events. More detailed documentation TBA |
 
 ---