feat: base Astro template for RU market

- Astro config with RSS, sitemap
- Pagefind search integration
- Schema.org structured data
- JSON Feed
- 10 starter pages (home, about, blog)
- 6 blog post templates
- llms.txt for LLM consumption
- bun package manager
- .gitignore (node_modules, dist, .astro)

astro.config.mjs

@@ -0,0 +1,12 @@
+import { defineConfig } from 'astro/config';
+import sitemap from '@astrojs/sitemap';
+
+export default defineConfig({
+  site: 'https://izhs-dom.ru',
+  output: 'static',
+  integrations: [sitemap()],
+  image: {
+    service: { entrypoint: 'astro/assets/services/sharp' },
+    formats: ['avif', 'webp'],
+  },
+});