feat: добавить локализацию документации и скиллов

- добавлены английские README и руководства с переключением языка
- сборка скиллов разделена на английскую и русскую версии
- локализованные документы включены в npm-пакет

docs/en/next-app.md

@@ -0,0 +1,102 @@
+# Next.js App Router
+
+[← Back to home](../../README.md)
+
+Two explicit modes are supported:
+
+| Bundler | Mode key | Next.js version |
+|---|---|---|
+| Turbopack | `next@app/turbopack` | 16.2+ |
+| Webpack 5 | `next@app/webpack` | 13.4+ |
+
+## 1. Install the package
+
+```bash
+npm install @gromlab/svg-sprites
+```
+
+## 2. Create a sprite module
+
+```text
+src/ui/file-manager/svg-sprite/
+├── icons/
+│   ├── check.svg
+│   └── folder.svg
+└── svg-sprite.config.ts
+```
+
+```ts
+// src/ui/file-manager/svg-sprite/svg-sprite.config.ts
+import { defineNextSpriteConfig } from '@gromlab/svg-sprites'
+
+export default defineNextSpriteConfig({
+  name: 'file-manager',
+  description: 'File manager icons',
+})
+```
+
+## 3. Add generation
+
+For Turbopack:
+
+```json
+{
+  "scripts": {
+    "sprite:file-manager": "svg-sprites --mode next@app/turbopack src/ui/file-manager/svg-sprite",
+    "predev": "npm run sprite:file-manager",
+    "prebuild": "npm run sprite:file-manager"
+  }
+}
+```
+
+For Webpack, replace the mode key with `next@app/webpack`. In Next 13–15, Webpack is used with the regular `next build` command; in Next 16, use `next build --webpack`.
+
+## 4. Use it in a Server Component
+
+The generated component does not contain `'use client'`, so it can be imported directly into `page.tsx` or `layout.tsx`:
+
+```tsx
+import { FileManagerIcon } from '@/ui/file-manager/svg-sprite'
+
+export default function Page() {
+  return (
+    <main>
+      <FileManagerIcon icon="folder" width={24} height={24} />
+    </main>
+  )
+}
+```
+
+Next.js emits a separate SVG asset with a content hash. The same generated code is used during SSR and in the browser, with no URL mismatch.
+
+## 5. Add SpriteViewer
+
+The viewer is interactive, so it requires a separate Client Component boundary:
+
+```tsx
+'use client'
+
+import { SpriteViewer } from '@gromlab/svg-sprites/react'
+
+const sources = [
+  () => import('@/ui/file-manager/svg-sprite/manifest'),
+]
+
+export default function SpritesPage() {
+  return <SpriteViewer sources={sources} />
+}
+```
+
+## Verify the bundler
+
+```bash
+# Turbopack
+npx next build --turbopack
+
+# Webpack 5
+npx next build --webpack
+```
+
+For Next 13–15 with Webpack, use `npx next build` without the flag.
+
+The Next.js command and the generator mode key must target the same bundler.