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/example/README.md

@@ -1,50 +1,10 @@
-# React + TypeScript + Vite
+# Effect View Example
 
-This template provides a minimal setup to get React working in Vite with HMR and some ESLint rules.
+Minimal React example for `effect-view`, Effect V4, and `effect-lens@2`.
 
-Currently, two official plugins are available:
-
-- [@vitejs/plugin-react](https://github.com/vitejs/vite-plugin-react/blob/main/packages/plugin-react/README.md) uses [Babel](https://babeljs.io/) for Fast Refresh
-- [@vitejs/plugin-react-swc](https://github.com/vitejs/vite-plugin-react-swc) uses [SWC](https://swc.rs/) for Fast Refresh
-
-## Expanding the ESLint configuration
-
-If you are developing a production application, we recommend updating the configuration to enable type aware lint rules:
-
-- Configure the top-level `parserOptions` property like this:
-
-```js
-export default tseslint.config({
-  languageOptions: {
-    // other options...
-    parserOptions: {
-      project: ['./tsconfig.node.json', './tsconfig.app.json'],
-      tsconfigRootDir: import.meta.dirname,
-    },
-  },
-})
+```bash
+bun run dev
 ```
 
-- Replace `tseslint.configs.recommended` to `tseslint.configs.recommendedTypeChecked` or `tseslint.configs.strictTypeChecked`
-- Optionally add `...tseslint.configs.stylisticTypeChecked`
-- Install [eslint-plugin-react](https://github.com/jsx-eslint/eslint-plugin-react) and update the config:
-
-```js
-// eslint.config.js
-import react from 'eslint-plugin-react'
-
-export default tseslint.config({
-  // Set the react version
-  settings: { react: { version: '18.3' } },
-  plugins: {
-    // Add the react plugin
-    react,
-  },
-  rules: {
-    // other rules...
-    // Enable its recommended rules
-    ...react.configs.recommended.rules,
-    ...react.configs['jsx-runtime'].rules,
-  },
-})
-```
+The counter demonstrates a V4 `SubscriptionRef` exposed as an Effect Lens and
+rendered through an Effect View component.