Add server support for event-driven architecture.

[iberdinsky-skilld]

Currently server provide endpoints for front application via Open Api https://www.openapis.org/ To review them run: ./bin/launchr web --swagger-ui and open http://localhost:8080/api/swagger-ui/

But for some front features we need to implement Async Api https://www.asyncapi.com/en

These features are:

• Dynamic list of currently launched/finished/never started actions
• Stdout/Stderr or action launched to display in visual web terminal
• Probably actions list

Some POC added in this PR https://github.com/launchrctl/web/pull/4/files Here I've added https://github.com/asyncapi/glee nodejs server to generate messages. There are go modules which can be used here. Probably some else.

• https://github.com/gorilla/websocket

• https://github.com/swaggest/go-asyncapi

• https://github.com/lerenn/asyncapi-codegen

As result of this ticket we need:

• [ ] Generate async api document from backend code or at least strict follow it.
• [ ] Send/Receive message for launch action and return stdout/err. Action has id, time start?, process id. One action can be runned multiple times.
• [ ] Send/receive message for dynamic runned/finished/never started actions
• [ ] Optionally send/receive messages for actions list and action schema.

Also we can research here combination of https://xtermjs.org/ on front and https://github.com/zephinzer/cloudshell on back.