better：重整配置，分离表达，聊天模式区分

重整配置文件路径，添加更多配置选项
分离了人设表达方式和学习到的表达方式
将聊天模式区分为normal focus和auto

src/config/config.py

@@ -14,10 +14,9 @@ from rich.traceback import install
 from src.config.config_base import ConfigBase
 from src.config.official_configs import (
     BotConfig,
-    ChatTargetConfig,
     PersonalityConfig,
     IdentityConfig,
-    PlatformsConfig,
+    ExpressionConfig,
     ChatConfig,
     NormalChatConfig,
     FocusChatConfig,
@@ -30,6 +29,7 @@ from src.config.official_configs import (
     TelemetryConfig,
     ExperimentalConfig,
     ModelConfig,
+    MessageReceiveConfig,
 )
 
 install(extra_lines=3)
@@ -139,14 +139,14 @@ class Config(ConfigBase):
     MMC_VERSION: str = field(default=MMC_VERSION, repr=False, init=False)  # 硬编码的版本信息
 
     bot: BotConfig
-    chat_target: ChatTargetConfig
     personality: PersonalityConfig
     identity: IdentityConfig
-    platforms: PlatformsConfig
     chat: ChatConfig
+    message_receive: MessageReceiveConfig
     normal_chat: NormalChatConfig
     focus_chat: FocusChatConfig
     emoji: EmojiConfig
+    expression: ExpressionConfig
     memory: MemoryConfig
     mood: MoodConfig
     keyword_reaction: KeywordReactionConfig