Properly define the boundary layer specification

[Cellivar]

The goal of this project is to create a shim layer that can slide between another library and the actual WebUSB API. By fitting into this layer it is possible to intercept and redirect requests for data or responses from devices.

This is, inherently, difficult. The browser is doing a lot of heavy lifting within these APIs, and being able to transactionalize messages will be important. Handling isochronous data will be fascinating.

This issue tracks the work to figure out what is possible and what is not possible in this library, and how that maps to the project.

[Cellivar]

Scattered notes:

• Broadcast channel API for passing messages between tabs.
• Web Locks API for handling ownership between 'active' and 'inactive' tabs.
• Web Serial for serial comms.
• WebUSB.
• WebHID.
• Web Bluetooth.

[Cellivar]

Also neat for another device to support!