Add /label and /assign commands.

Closes #95786. Closes #78432.

.github/commands.json

@@ -325,5 +325,20 @@
 		"action": "close",
 		"addLabel": "*caused-by-extension",
 		"comment": "It looks like this is caused by the Java Debugger extension. Please file it with the repository [here](https://github.com/Microsoft/vscode-java-debug). Make sure to check their issue reporting template and provide them relevant information such as the extension version you're using. See also our [issue reporting](https://aka.ms/vscodeissuereporting) guidelines for more information.\n\nHappy Coding!"
+	},
+	{
+		"type": "comment",
+		"name": "label",
+		"allowUsers": []
+	},
+	{
+		"type": "comment",
+		"name": "assign",
+		"allowUsers": [
+			"cleidigh",
+			"usernamehw",
+			"gjsjohnmurray",
+			"IllusionMH"
+		]
 	}
 ]