Setup Guide for jecs

[YetAnotherClown]

As an effort to provide well made documentation for YetAnotherNet, it would be great to provide an official setup guide for jecs in the Documentation, similar to the Matter and ECR setup guide.

This is an example of how you could integrate YetAnotherNet in jecs, provided by @Ukendio.
We should build and improve upon this example when creating a "best setup" for jecs as this may not be the most optimal way of going about this.

local trackers = {}
for component in world:query(Networked) do
  local tracker = ChangeTracker(component)
  table.insert(trackers, tracker)
end

local function sys(world) 
  for _, tracker in trackers do 
    tracker:track(world, function(changes) 
      for id in changes.added() do 
        routes.added:send(id)
      end
      for id, old, new in changes.changed() do 
        routes.changed:send(id, old, new)
      end
      for id in changes.removed() do 
        routes.removed:send(id)
      end
    end)
  end
end