To install via commandline:
sudo installer -verbose -pkg "path/to/Read&WriteAutoCorrect.pkg" -target /
To install license key, for each user: [will be covered by however Read&Write does licensing]
MDM .mobileconfig - Allows RWAC access to the keyboard to allow corrections. Example profile here: https://docs.google.com/document/d/e/2PACX-1vTRCMToNs2GFsAQYHKwjGWpbYey_INWNh13I98vw6mTMi1GNnrXzAs-dTLHFRBT4bVHb7-kxli_8Cve/pub