chore: 整理插件分类 - 删除图像类，移动娱乐类

删除（图像类）:
- ai_image.py (AI生图)
- image_generator.py (ComfyUI生图)
- send_image.py (远程发图)

移至插件仓库（娱乐/可选）:
- color_picker.py
- bookmark_manager.py
- audio_player.py

保留24个必备生产力插件:
核心: code_editor/git_tools/file_manager/cmd_executor/terminal
工程: auto_engineer/frontend_tester/workflow/sub_agent
搜索: ai_search/tool_search/network_tools
自动化: browser_auto/gui_auto
数据: json_toolkit/regex_tester/markdown_tool/id_generator/snippet_manager
系统: scheduler/task_manager/memory_plugin/operit_bridge/speech_recognition

更新 README.md/plugin_registry.json/plugins_config.py

plugins_config.py

@@ -1,11 +1,10 @@
 # 小狸插件配置
 
+# ── 必备生产力 ──
 ENABLE_AI_SEARCH = True
-ENABLE_AUDIO_PLAYER = True
 ENABLE_CMD_EXECUTOR = True
 ENABLE_FILE_MANAGER = True
 ENABLE_CODE_EDITOR = True
-ENABLE_CODE_SEARCH = True
 ENABLE_GIT_TOOLS = True
 ENABLE_FRONTEND_TESTER = True
 ENABLE_NETWORK_TOOLS = True
@@ -14,10 +13,15 @@ ENABLE_SPEECH_RECOGNITION = True
 ENABLE_TASK_MANAGER = True
 ENABLE_TOOL_SEARCH = True
 ENABLE_AUTO_ENGINEER = True
-ENABLE_GIT_WORKFLOW = True
-ENABLE_PROJECT_ANALYZER = True
-
-ENABLE_DGLAB_WS = False
-
 ENABLE_TERMINAL = True
 ENABLE_OPERIT_BRIDGE = True
+ENABLE_BROWSER_AUTO = True
+ENABLE_GUI_AUTO = True
+ENABLE_SUB_AGENT = True
+ENABLE_WORKFLOW = True
+ENABLE_MEMORY_PLUGIN = True
+ENABLE_JSON_TOOLKIT = True
+ENABLE_REGEX_TESTER = True
+ENABLE_SNIPPET_MANAGER = True
+ENABLE_MARKDOWN_TOOL = True
+ENABLE_ID_GENERATOR = True