Refactor async effects

[JonasGruenwald]

Two issues:

1. Async effects for data fetching like the one used in the processes server component use the server component's subject to send a message to it(self), when they should instead just use dispatch from the effect, reference for how this should work: https://github.com/hayleigh-dot-dev/dialup/blob/762a6db149e2e161318a9712561fad033b3a4909/src/dialup.gleam#L309
2. Most data fetching is not async yet, mainly just the OTP status stuff – this should be changed as we now allow inspecting other nodes, so data fetching may cause delays and shouldn't block server component loops