feat: expose database adapter #3631
Description
Is your feature request related to a problem? Please describe
Custom transformers are currently very limited for complex cases where some data needs to be accessed multiple time accross startups.
In my use case, when LaTeX files that are included in the LaTeX main file are parsed (outside of the main file, to create a page), they need to access the main file data.
I also would like to store LaTeX specific metadata in the database.
Describe the solution you'd like
Being able to access the database adapter would be nice, e.g.: import { getLocalDatabase } from '@nuxt/content/utils/database'
Describe alternatives you've considered
Use nuxt's builtin storage systems, but this seems redundant and adds complexity (since transformers run in different contexts).
Additional context
None