feat(config, layout, components): enhance security headers, improve SEO, and update project descriptions

- Added security headers in the Next.js configuration to enhance application security.
- Updated metadata in the layout component for improved SEO, including new titles, descriptions, and keywords.
- Introduced JSON-LD schema for projects to enhance search engine visibility.
- Enhanced project descriptions in the portfolio data for clarity and detail.
- Improved header component with logo integration and refined social media links for better accessibility.

app/manifest.ts

@@ -0,0 +1,29 @@
+import { MetadataRoute } from 'next'
+
+export default function manifest(): MetadataRoute.Manifest {
+  return {
+    name: 'Evandro Fonseca Junior - Portfólio',
+    short_name: 'Evandro.dev',
+    description: 'Portfólio profissional de Evandro Fonseca Junior, Desenvolvedor Full-Stack',
+    start_url: '/',
+    display: 'standalone',
+    background_color: '#000000',
+    theme_color: '#000000',
+    orientation: 'portrait-primary',
+    categories: ['portfolio', 'developer', 'technology'],
+    lang: 'pt-BR',
+    dir: 'ltr',
+    icons: [
+      {
+        src: '/favicon.ico',
+        sizes: 'any',
+        type: 'image/x-icon',
+      },
+      {
+        src: '/icon.svg',
+        sizes: 'any',
+        type: 'image/svg+xml',
+      },
+    ],
+  }
+}