Add TypeScript types for store

**Description**
Currently models lacks proper pagination support.

**Proposed solution**
Add configurable pagination with sensible defaults.

**Priority**: Low/Medium

Start by locating the models and store implementation referenced by the issue, then compare the requested TypeScript types with the proposed pagination behavior. Confirm the expected defaults and configuration surface before making changes; done means the store has configurable pagination with sensible defaults and matching types.

Written by the indexing model from the issue text.