implement plugins possibility

We could imagine that Prisma works as a core system for DA/DQ and needs for specific contexts (either applications types and/or company preferences - think as open source tool), could be plugged into Prisma.

As an application case, we could see linkage to company DataBase.

The issue names no files, tests, or entry points to inspect. Begin by clarifying the plugin boundaries, supported application or company-specific contexts, and the intended database linkage; completion would require an agreed design and implementation scope.

Written by the indexing model from the issue text.