Lite 21975 Redesign of EaaS websocket channel data models

[bdjilka]

• skeleton of project
• new design of ws data models
• backwards capability (function to transform old schemas to new ones)

PR is open to discuss naming of new models, its attributes and nesting content.

[bdjilka]

I miss a function to transform from v2 to v1 because we need it to respond to legacy runners.

Ooops, missed it. Of course will implement.