Finalize the Effect View rename and refresh docs, examples, and tooling (#59)

## Summary

- Rename `effect-fc-next` to `effect-view` and update package metadata, internal symbols, imports, and repository references.
- Promote the Effect 4 example to `packages/example` and move the legacy Effect 3 example to `packages/effect-fc-example`.
- Add `effect-view` to the npm publishing workflow.
- Update the Vite Fast Refresh plugin for `effect-view` and rename `effectViewPlugin()` to `effectView()`.
- Upgrade Effect, React, TypeScript, build tooling, and related dependencies.
- Refresh the documentation and homepage.

## Documentation

- Add a dedicated Async guide covering:
  - Suspense fallbacks
  - Hook ordering
  - Memoization
  - Structural prop equality
- Clarify synchronous and asynchronous component behavior.
- Document runner scope and service requirements.
- Explain stable construction of Query, Mutation, and Form instances.
- Expand focused Lens and Form examples, including curried focus helpers.
- Document the optional `@effect/platform-browser` dependency for window-focus query refresh.
- Improve the Forms guide structure and examples.
- Fix responsive homepage headline wrapping and update homepage copy.

## Notable API changes

- Package rename:

  ```diff
  - effect-fc-next
  + effect-view

---------

Co-authored-by: Julien Valverdé <julien.valverde@mailo.com>
Reviewed-on: #59

packages/vite-plugin/README.md

@@ -3,26 +3,26 @@
 Experimental Vite Fast Refresh support for Effect View components.
 
 ```ts
-import { effectViewPlugin } from "@effect-view/vite-plugin"
+import { effectView } from "@effect-view/vite-plugin"
 import react from "@vitejs/plugin-react"
 import { defineConfig } from "vite"
 
 export default defineConfig({
     plugins: [
-        effectViewPlugin(),
+        effectView(),
         react(),
     ],
 })
 ```
 
 The plugin recognizes `Component.make` and `Component.makeUntraced`
-definitions imported from `effect-fc-next`. The legacy `effect-fc` package is
-not supported. `effect-fc-next` owns the bundler-neutral refresh cell protocol;
+definitions imported from `effect-view`. The legacy `effect-fc` package is
+not supported. `effect-view` owns the bundler-neutral refresh cell protocol;
 this package is the Vite adapter that retains those cells in HMR data. The
 plugin assigns stable development IDs and self-accepts successfully
 instrumented modules.
 
-The adapter-facing protocol is exported from `effect-fc-next/Refreshable`.
+The adapter-facing protocol is exported from `effect-view/Refreshable`.
 
 Renaming or removing an instrumented View invalidates the module upward instead
 of leaving a stale mounted descriptor.