Add an app to the app catalog using the ALM API: <appCatalogUrl>/_api/web/tenantappcatalog/AvailableApps/Add

• command name: spo tenant app add --filePath|-p <filePath> --overwrite|-o
• requires connection to a SharePoint site

More information: https://github.com/SharePoint/PnP-Sites-Core/blob/73c703c507d480142ec18c241e6e72aae67982cc/Core/OfficeDevPnP.Core/ALM/AppManager.cs