refactor: 独立resprule为单独的包

pkg/qqbot/resprule/rules/random.py

@@ -0,0 +1,22 @@
+import random
+
+import mirai
+
+from .. import rule as rule_model
+from .. import entities
+
+
+class RandomRespRule(rule_model.GroupRespondRule):
+
+    async def match(
+        self,
+        message_text: str,
+        message_chain: mirai.MessageChain,
+        rule_dict: dict
+    ) -> entities.RuleJudgeResult:
+        random_rate = rule_dict['random_rate']
+        
+        return entities.RuleJudgeResult(
+            matching=random.random() < random_rate,
+            replacement=message_chain
+        )