feat: improve SEO with structured data, breadcrumbs, and comprehensive favicon support while optimizing images and config performance.

public/site.webmanifest

@@ -0,0 +1,26 @@
+{
+  "name": "ESPDocs",
+  "short_name": "ESPDocs",
+  "description": "Documentação do ecossistema ESP32 em português brasileiro",
+  "start_url": "/",
+  "display": "standalone",
+  "background_color": "#020617",
+  "theme_color": "#8b5cf6",
+  "icons": [
+    {
+      "src": "/favicon-48x48.png",
+      "sizes": "48x48",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-192.png",
+      "sizes": "192x192",
+      "type": "image/png"
+    },
+    {
+      "src": "/icon-512.png",
+      "sizes": "512x512",
+      "type": "image/png"
+    }
+  ]
+}