Add reaction and message

.vscode/launch.json

@@ -6,6 +6,7 @@
     "configurations": [
         {
             "name": "nexusbot",
+            "preLaunchTask": "rm-socket",
             "program": "bin/nexusbot.dart",
             "args": [
                 "--socket",

.vscode/tasks.json

@@ -0,0 +1,14 @@
+{
+    "version": "2.0.0",
+    "tasks": [
+        {
+            "label": "rm-socket",
+            "type": "shell",
+            "presentation": {
+                "reveal": "silent",
+                "close": true
+            },
+            "command": "rm socket || true"
+        }
+    ]
+}