Add minimal Detaching notify support

- Add Detaching define to YAML command list
- Add decoding support, convert to web UI uiMessage

debugger/duk_debug.js

@@ -54,6 +54,7 @@ var CMD_PRINT = 0x02;
 var CMD_ALERT = 0x03;
 var CMD_LOG = 0x04;
 var CMD_THROW = 0x05;
+var CMD_DETACHING = 0x06;
 
 // Commands initiated by the debug client (= us)
 var CMD_BASICINFO = 0x10;
@@ -1702,6 +1703,8 @@ Debugger.prototype.processDebugMessage = function (msg) {
             this.uiMessage({ type: 'log', level: msg[2], message: prettyUiStringUnquoted(msg[3], UI_MESSAGE_CLIPLEN) });
         } else if (msg[1] === CMD_THROW) {
             this.uiMessage({ type: 'throw', fatal: msg[2], message: (msg[2] ? 'UNCAUGHT: ' : 'THROW: ') + prettyUiStringUnquoted(msg[3], UI_MESSAGE_CLIPLEN), fileName: msg[4], lineNumber: msg[5] });
+        } else if (msg[1] === CMD_DETACHING) {
+            this.uiMessage({ type: 'detaching', reason: msg[2], message: 'DETACH: ' + (msg.length >= 5 ? prettyUiStringUnquoted(msg[3]) : 'detaching') });
         } else {
             // Ignore unknown notify messages
             console.log('Unknown notify, ignoring: ' + prettyDebugMessage(msg));

debugger/duk_debugcommands.yaml

@@ -6,7 +6,7 @@
 - Alert
 - Log
 - Throw
-- Reserved_6
+- Detaching
 - Reserved_7
 - Reserved_8
 - Reserved_9