feat: add feeds schema and related types; update package scripts
- Added a new schema for feeds in `src/schema/feeds.ts` with fields for id, displayName, description, did, uri, userId, xataVersion, createdAt, and updatedAt.
- Introduced types for selecting and inserting feeds using Drizzle ORM.
- Updated `package.json` to include a new script for feeding data: `feed`.
- Modified `_journal.json` to include a new entry for "whole greymalkin".
work in progress
work in progress