Remote widget

[lesleysin]

Description

Current behavior:
Duit requests from the server or receives a layout via a static constructor. The layout is a JSON that broadly describes a single widget (the root widget).

Proposal:
Implement a new type of widget (RemoteWidget) that is capable of requesting its own content on its own.

This will allow you to implement scenarios for dynamically loading parts of layouts, reducing the initial JSON size e.g. bottom sheet content, hidden content or PageView pages.

This issue affects other repositories. To successfully solve the problem, you also need to add updates to the appropriate packages

Affected packages:

• duit_js
• duit_go