feat: добавить хаб документаций

- добавлен React/Vite-лендинг с карточками документаций
- добавлена генерация корневого llms.txt из конфига документов
- добавлена сборка SLM Design через VitePress
- добавлены Dockerfile, Caddyfile и Gitea CI/CD
- настроены контекстные Link headers для llms.txt

vite.config.ts

@@ -0,0 +1,63 @@
+import { existsSync, readFileSync } from 'node:fs'
+import { resolve } from 'node:path'
+import { defineConfig, type Plugin } from 'vite'
+import react from '@vitejs/plugin-react'
+
+function serveBuiltDocs(): Plugin {
+  return {
+    name: 'serve-built-docs',
+    configureServer(server) {
+      const publicDir = resolve('public')
+
+      server.middlewares.use((req, res, next) => {
+        const url = req.url?.split('?')[0]
+        if (!url) return next()
+
+        const filePath = resolve(publicDir, url.slice(1))
+
+        if ((url.endsWith('.txt') || url.endsWith('.md')) && existsSync(filePath)) {
+          res.setHeader(
+            'Content-Type',
+            url.endsWith('.md')
+              ? 'text/markdown; charset=utf-8'
+              : 'text/plain; charset=utf-8',
+          )
+          res.end(readFileSync(filePath))
+          return
+        }
+
+        const [, site] = url.split('/')
+        if (!site || site.includes('.')) return next()
+
+        const siteDir = resolve(publicDir, site)
+        if (!existsSync(resolve(siteDir, 'index.html'))) return next()
+
+        if (url === `/${site}`) {
+          req.url = `/${site}/index.html`
+          return next()
+        }
+
+        if (url.endsWith('/')) {
+          if (existsSync(resolve(filePath, 'index.html'))) {
+            req.url = `${url}index.html`
+            return next()
+          }
+        }
+
+        if (!url.split('/').pop()?.includes('.')) {
+          if (existsSync(`${filePath}.html`)) {
+            req.url = `${url}.html`
+            return next()
+          }
+        }
+
+        next()
+      })
+    },
+  }
+}
+
+// https://vite.dev/config/
+export default defineConfig({
+  plugins: [react(), serveBuiltDocs()],
+})