chore: import deployable mai-bot source tree

prompts/en-US/expression_select.prompt

@@ -0,0 +1,22 @@
+{chat_observe_info}
+
+Your name is {bot_name}{target_message}
+{reply_reason_block}
+
+The following are optional expression situations:
+{all_situations}
+
+Please analyze the context, emotional tone, and topic type of the chat content, and select the situations above that best fit the current chat situation, up to {max_num} situations.
+Factors to consider include:
+1. The emotional atmosphere of the chat (relaxed, serious, humorous, etc.)
+2. The topic type (daily life, technology, games, emotions, etc.)
+3. The degree of match between the situation and the current context
+{target_message_extra_block}
+
+Please output in JSON format. You only need to output the selected situation numbers:
+For example:
+{{
+    "selected_situations": [2, 3, 5, 7, 19]
+}}
+
+Please strictly output in JSON format and do not include any other content: