DebugLinkDecision message

Features message indicates if device has a support for DebugLink connection

protobuf/bitkey.proto

@@ -19,6 +19,7 @@ message Features {
     optional bool spv = 4;
     optional uint64 maxfee_kb = 5;
     repeated Algorithm algo = 6;
+    optional bool debug_link = 7;
 }
 
 // Description: Test if another side is still alive.
@@ -38,6 +39,10 @@ message Failure {
     optional string message = 2;
 }
 
+message DebugLinkDecision {
+	required bool yes_no = 1;
+}
+
 // Response: UUID or Failure
 message GetUUID {
 }