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/legacy.md

@@ -0,0 +1,102 @@
+# Legacy mode
+
+[← Back to home](../../README.md)
+
+A quick guide to generating centralized SVG sprites in `symbol` and `stack` formats, with an optional HTML preview.
+
+## 1. Install the package
+
+```bash
+npm install @gromlab/svg-sprites
+```
+
+## 2. Prepare the icons and config
+
+```text
+project/
+├── src/assets/icons/
+│   ├── check.svg
+│   └── folder.svg
+└── svg-sprites.config.ts
+```
+
+```ts
+// svg-sprites.config.ts
+import { defineLegacyConfig } from '@gromlab/svg-sprites'
+
+export default defineLegacyConfig({
+  output: 'public/sprites',
+  preview: true,
+  sprites: [
+    {
+      name: 'icons',
+      input: 'src/assets/icons',
+      format: 'symbol',
+    },
+  ],
+})
+```
+
+## 3. Run generation
+
+```bash
+npx svg-sprites --mode legacy .
+```
+
+Result:
+
+```text
+public/sprites/
+├── icons.sprite.svg
+└── preview.html
+```
+
+With `preview: false`, the HTML file is not created. For the `stack` format, specify `format: 'stack'`.
+
+## 4. Use the symbol sprite
+
+```html
+<svg width="24" height="24" aria-label="Done">
+  <use href="/sprites/icons.sprite.svg#check"></use>
+</svg>
+```
+
+## 5. Add a package script
+
+```json
+{
+  "scripts": {
+    "sprites": "svg-sprites --mode legacy .",
+    "prebuild": "npm run sprites"
+  }
+}
+```
+
+## Multiple sprites
+
+Add multiple entries to `sprites`:
+
+```ts
+sprites: [
+  {
+    name: 'icons',
+    input: 'src/assets/icons',
+    format: 'symbol',
+  },
+  {
+    name: 'logos',
+    input: 'src/assets/logos',
+    format: 'stack',
+  },
+]
+```
+
+All output files and the shared `preview.html` will be written to `output`.
+
+## Troubleshooting
+
+- Config not found: make sure `svg-sprites.config.ts` is located in the specified root directory.
+- No icons: check `sprites[].input` and the `.svg` extension.
+- Preview not needed: set `preview: false`.
+
+For programmatic use, see [`generateLegacy`](programmatic-api.md#generatelegacy).