Lookml files should merge with existing views

[owlas]

If I already have a view file, I'd like to merge in any new columns I've added in dbt.

For example, if I have a description in dbt but not in looker, I'd like to add it

If looker already has a description, it should be left alone

Thread in dbt slack: https://getdbt.slack.com/archives/C01DPMVM2LU/p1650353949839609?thread_ts=1649968691.671229&cid=C01DPMVM2LU