feat(frontend): Redesign UI for single-page flow and expose Swarm functionality

[rainbowpuffpuff]

Currently, the frontend has a couple of areas for improvement:

1. Two-Page Structure: The user flow is split across two pages, which feels disjointed. We should refactor this into a single-page application experience, similar to the user journey in the ez_think2earn repository. This will likely involve consolidating the UI into a single, dynamic view.

2. Missing Swarm Controls: The core Swarm functionalities (like uploading, downloading, creating paywalls, etc.) implemented with bee-js are not yet connected to any user-facing buttons or controls. We need to add the necessary UI elements to allow users to interact with these features.

Tasks:

• Redesign the main page to be a single-page application.
• Add buttons and UI elements for bee-js functionalities (e.g., 'Upload to Swarm', 'Download from Swarm', 'Create Paywall').
• Ensure the new UI components are properly connected to the useSwarm hook and SwarmContext.
• Review and simplify the UI, removing any unnecessary buttons or elements, guided by the ez_think2earn user flow.