Add Effect v4 support, Fast Refresh tooling, and revamped docs (#56)

## Summary

- Add `effect-fc-next`, a React 19 integration targeting Effect v4 beta.
- Introduce component lifecycles, scoped resources, queries, mutations, forms, lenses, views, and refreshable components.
- Add `@effect-view/vite-plugin` for Vite Fast Refresh support.
- Add an Effect v4 example application covering the new APIs.
- Expand test coverage for both the existing and next-generation packages.
- Replace the starter Docusaurus content with complete Effect View documentation while preserving the Effect v3 docs as a versioned snapshot.
- Update the landing page, navigation, package scripts, and build output.
- Extend CI with linting, tests, package builds, Docker builds, and container publishing.

## Validation

- `bun lint:tsc`
- `bun lint:biome`
- `bun test`
- `bun run build`
- `bun pack`
- Docker image build

---------

Co-authored-by: Julien Valverdé <julien.valverde@mailo.com>
Reviewed-on: Thilawyn/effect-fc#56

packages/example/src/routes/dev/context.tsx

@@ -23,7 +23,7 @@ const SubComponent = Component.makeUntraced("SubComponent")(function*() {
 const ContextView = Component.makeUntraced("ContextView")(function*() {
     const [serviceValue, setServiceValue] = React.useState("test")
     const SubServiceLayer = React.useMemo(() => SubService.Default(serviceValue), [serviceValue])
-    const SubComponentFC = yield* Effect.provide(SubComponent.use, yield* Component.useContextFromLayer(SubServiceLayer))
+    const SubComponentFC = yield* Effect.provide(SubComponent.use, yield* Component.useLayer(SubServiceLayer))
 
     return (
         <Container>

packages/example/src/routes/form.tsx

@@ -129,7 +129,7 @@ class RegisterFormView extends Component.make("RegisterFormView")(function*() {
 const RegisterPage = Component.make("RegisterPageView")(function*() {
     const RegisterForm = yield* Effect.provide(
         RegisterFormView.use,
-        yield* Component.useContextFromLayer(RegisterFormService.Default),
+        yield* Component.useLayer(RegisterFormService.Default),
     )
 
     return <RegisterForm />

packages/example/src/routes/index.tsx

@@ -11,7 +11,7 @@ const TodosStateLive = TodosState.Default("todos")
 const Index = Component.make("IndexView")(function*() {
     const Todos = yield* Effect.provide(
         TodosView.use,
-        yield* Component.useContextFromLayer(TodosStateLive),
+        yield* Component.useLayer(TodosStateLive),
     )
 
     return <Todos />