[WIP] Rewrite derivations to improve state management

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

Issue Title: Signals: Rewrite derivations to be better
Issue Description: Make it so that way derivations use a new model in which instead of being dependent on a Lifetime, they have two states, living and sleeping.

A derivation becomes Living when there are subscribers

A derivation becomes Sleeping when there is no subscribers

When a derivation goes from Living to Sleeping, it removes its subscriptions to its dependencies.

When a derivation goes from Sleeping to Living, it re-evaluates its dependencies and adds its subscriptions again.

This change will also make all derivations dynamic, instead of it being static-dependencies by default.

Although the core of this change is in @vortexjs/core, it may have wide-reaching implications throughout its codebase, as it will no longer support the dynamic prop, due to all derivations being dynamic by default.
Fixes https://linear.app/vortexjs/issue/VOR-47/signals-rewrite-derivations-to-be-better

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