Mark duplicate hotkeys

tabby-core/src/api/hotkeyProvider.ts

@@ -3,6 +3,11 @@ export interface HotkeyDescription {
     name: string
 }
 
+export interface Hotkey {
+    strokes: string[] | string; // may be a sequence of strokes
+    isDuplicate: boolean;
+}
+
 /**
  * Extend to provide your own hotkeys. A corresponding [[ConfigProvider]]
  * must also provide the `hotkeys.foo` config options with the default values