Remove cyclic dependencies

[yuantian-agentspace]

One example:

renderers/lit/src/0.8/ui/component-registry.ts imports from ./ui.ts by import { CustomElementConstructorOf } from "./ui.js";

./ui.ts imports from "./component-registry.js" by export { ComponentRegistry, componentRegistry } from "./component-registry.js";

[jacobsimionato]

Closing this as obsolete seeing as we're focusing on v0.9 renderers now.