fix: don't add default title field, use proper phrasing for adding files

[CyanVoxel]

Summary

This PR makes a couple changes to the experience of adding new file entries:

1. A default "Title" field is no longer added to new file entries that are added to a library. This was discussed as a positive change in SQLite DB with SQLAlchemy II #332, however since the removal of tag fields in feat!: tag categories #655 it's been strange to only have the default title field remain from this original decision.
   • NOTE: The DB currently has an is_default column for the value_type table which was used for this original choice. This is likely no longer needed, but its purpose should be decided once users are allowed to set their own preferred default fields (which is out of the scope of this PR).
2. The terminology used when adding files has been changed from talking about "running macros" to "adding files". This is especially important since most of the time spent during this operation is simply adding the new entries to the database, rather than "running configured macros".