feat: support keybind mode

protocols/dwl-ipc-unstable-v2.xml

@@ -234,6 +234,13 @@ I would probably just submit raphi's patchset but I don't think that would be po
       <arg name="kb_layout" type="string" summary="current keyboard layout."/>
     </event>
 
+    <event name="keymode" since="2">
+      <description summary="current keybind mode.">
+        current keybind mode.
+      </description>
+      <arg name="keymode" type="string" summary="current keybind mode."/>
+    </event>
+
   </interface>
 
 </protocol>