Add Bilibili video analysis plugin

Introduced a new 'bilibli' plugin for Bilibili video parsing and AI-based content analysis. Added plugin manifest, base module for video info retrieval and analysis, and plugin integration with tool registration. Updated .gitignore to include the new plugin directory.

.gitignore

@@ -325,7 +325,7 @@ run_pet.bat
 !/plugins/set_emoji_like
 !/plugins/permission_example
 !/plugins/hello_world_plugin
-!/plugins/take_picture_plugin
+!/plugins/bilibli
 !/plugins/napcat_adapter_plugin
 !/plugins/echo_example