Refactor all database drivers, query execution, schema operations, and business logic into a shared `dbx-core` crate. The Tauri desktop app becomes a thin shell delegating to dbx-core, enabling future web and CLI frontends to reuse the same core.
Co-authored-by: SuLe <sule@SuLedeMacBook-Air.local> Co-authored-by: skyler <77960507+t8y2@users.noreply.github.com>