Create the migration guide and replace references to the old migration guide in the driver readme
Create a markdown version of the release notes to be used at the time of release
Update the docs changes needed box with a link to the complete list of breaking changes
Add a mongodb@8.x column to the Component Support Matrix in the driver readme, with the supported range for bson, kerberos, mongodb-client-encryption and @mongodb-js/zstd, and N/A for bson-ext and mongodb-legacy