* build: Replace flutter_markdown with flutter_markdown_plus
* build: Update fl_lib dependency to v1.0.361 and synchronize related dependencies
Update the fl_lib dependency version in the pubspec.yaml and pubspec.lock files to v1.0.361, and simultaneously update the dependency versions of camera_avfoundation and objective_c
* build: Add flutter_markdown_plus dependency
* build: update the git reference of fl_lib