UISpec compatibility

Today tcomp returns UISpec payload for the UI, this is not acceptable since tcomp has not the front responsability so we must ensure tcomp payload can be stable even if the front widgets change or multiple applications use different technologies.

Idea is to use a uispec bridge libraries applications can integrate in their tcomp proxy. This task is about ensuring we support the complete model and that front team integrated our actions properly in their library.

Note: the current PoC uses http but we need to move it to the WebSocket transport (have a look to the studio client for instance we can probably extract in a component-client module)