[FEATURE] Connect the sessions of the CLI with the UI for better visibility

[edenreich]

Summary

There is a project https://github.com/inference-gateway/ui which was not maintain for a while because I was fully working on the CLI, now that the CLI is working solid, I think it's easier to just use the UI for the CLI.

The CLI should remain the foundation for the UI, but it would be also possible to resume a conversation from the UI.
In the UI the base64 images will be displayed properly. The steps and actions a user took will also be displayed. All from the same source of truth database.

Before processing this, I need to make sure that I've removed deprecated features and upgraded to the UI to the latest versions.

Acceptance Criteria

• The UI works seamlessly with the CLI
• Actions from the CLI are shown in the UI
• UI provide better UX, images output would be actually rendered - unlike in the terminal where they are shown as [Image # 1] etc..
• It's documented
• It's tested

[edenreich]

Refactoring process of the current UI has started. The UI in its current state is pretty well, I just need to delete a few deprecated features like A2A and make the integration of A2A similar to the CLI (direct connection instead of gateway depended).
I would need to make sure the CLI database can be used for the UI preview, I want the flow to be CLI-first approach.

The CLI is the main tool, and if someone really wants they would be able to use also the UI.

[edenreich]

Worth checking if this could follow the standard AG-UI or the newly introduced A2UI from Google.