✨ Feature: 添加多消息段命令解析支持 (#2419)

Co-authored-by: Ju4tCode <42488585+yanyongyu@users.noreply.github.com>

nonebot/rule.py

@@ -117,6 +117,11 @@ class TrieRule:
                 # check whitespace
                 arg_str = segment_text[len(pf.key) :]
                 arg_str_stripped = arg_str.lstrip()
+                # check next segment until arg detected or no text remain
+                while not arg_str_stripped and msg and msg[0].is_text():
+                    arg_str += str(msg.pop(0))
+                    arg_str_stripped = arg_str.lstrip()
+
                 has_arg = arg_str_stripped or msg
                 if (
                     has_arg