Allow bases to see "properties" generated by plugins

[Afeldspar]

Another related feature request:

Bases: Display, Access (and/or Filter using) the Note's Content

Problem Currently, when working with data in a base view, the only way to find specific records is by creating persistent filters. This works well for permanent organization, but creates friction for quick, one-time searches. Base views currently only allow filtering based on property values, but sometimes you need to search within the actual content of notes. For example, imagine you have recipe notes where the ingredients aren’t stored in properties but within the note body. If you want to fi…