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Implemented functions
joplin.views.menuItems
✅ Add "Set work directory" option
joplin.views.toolbarButtons
✅ Add "Open Panel" and "Close Panel" button
joplin.views.toolbarButtons
✅ Add "Insert Command" button
joplin.views.panels
✅ Interactive shell
the default is powershell for windows and zsh for other platforms
✅ Implement key: ctrl+c、up、down、left、right
the up/down key is used to view history command
✅ Multiple labels with button names