Integrate client-side support for pub/sub mechanism

[ETSells]

Feature Suggestion

Describe the Feature

SDEC-API wants to provide an implementation of the publisher/subscriber design pattern using websockets so that periodic polling of certain endpoints is no longer necessary. The dashboard project needs to integrate this mechanism.

Proposed Solution

Recommend making a common utility for this that doesn't hardcode information about SDEC-API. This will also be provided by the liquids microservice, so we'll want to be able to reuse it without too much effort.

Additional Notes

SDEC-side POC: @ETSells

[ETSells]

PR for API side is open. We will get that merged regardless of whether there is GUI side support since the legacy path will continue to be supported for the time being.

Our chosen implementation is SSE (server-sent events). These will allow you to connect like a normal http endpoint, but continue to receive responses over time. It is rate limited to 30 hz. I highly recommend that you create a module on the client side that can receive these messages and return the payload/timestamp/whatever else for the next view refresh. If typescript supports it, this would be great as a class that can be extended for the flight API and the liquids API.

[ETSells]

Assignee: Please monitor SunDevilRocketry/mod#137. Once it is completed, you should implement handling to set the altitude reference for unit conversions as part of this ticket.

Knowing how full-stack tickets usually go, I might end up picking this up, but if not please reach out to me for help figuring out what to do for this.