Initial commit of yell command

src/plugins/__init__.py

@@ -10,3 +10,4 @@ import plugins.the_house
 import plugins.meme
 import plugins.hangguy
 import plugins.finchat
+import plugins.yell

src/plugins/yell.py

@@ -0,0 +1,6 @@
+from command_system import as_plugin
+
+
+@as_plugin
+def yell():
+    return "Hello, world!"