Add /help command

src/quadnite_bot/commands/help.py

@@ -0,0 +1,17 @@
+from pathlib import Path
+from deltachat2 import NewMsgEvent
+from quadnite_bot.command import Command, Context
+
+
+class HelpCommand(Command):
+    command = "help"
+
+    def __init__(self):
+        self.responses = []
+        for file in sorted((Path(__file__).resolve().parent.parent / "static/help").iterdir()):
+            with open(file) as f:
+                self.responses.append(f.read())
+
+    def process_event(self, ctx: Context, event: NewMsgEvent) -> None:
+        for response in self.responses:
+            ctx.reply(response)