Extract Space Blobs listing into `@storacha/ui-react` and update Console

[luisawatkins]

Move the space content listing UI from Console into the shared UI package to provide a reusable SpaceBlobs component for rendering blob tables with pagination and refresh actions. Update Console's /space/[did]/blobs page to consume the shared component.

Motivation

• Promotes component reusability across different Storacha applications
• Separates presentational logic from data fetching concerns
• Establishes pattern for extracting Console UI into shared package

Scope

• Add SpaceBlobs component to @storacha/ui-react
• Export component from package index
• Replace Console's blobs page table implementation with shared component
• Maintain data fetching and cursor state management in Console app layer

Component Design

• Presentational component with no Next.js or Console-specific dependencies
• Uses multiformats/bases/base58 for digest encoding
• Accepts uploadHref prop for empty state CTA customization
• Exposes callback props: onNext, onPrev, onRefresh for pagination and refresh actions

Acceptance Criteria

• SpaceBlobs renders table with columns: digest, timestamp, size
• Empty state displays reload button and optional upload CTA
• Pagination controls invoke appropriate callback props
• Console blobs page successfully uses SpaceBlobs component
• @storacha/ui-react package builds without errors
• Component properly exported from package index