feat: add CI status indicator and favicon

- Add CI status badge in header (auto-syncs from Forgejo)
- Add rock-svg-icon.svg as favicon for Chrome
- Add SOPS encrypted secrets for Forgejo token
- Add decrypt script for local dev

app/layout.tsx

@@ -6,6 +6,10 @@ import { LanguageProvider } from '@/lib/LanguageContext'
 export const metadata = {
   title: 'Rock Liang — Portfolio & Live Infrastructure',
   description: 'Personal portfolio showcasing Kubernetes, Terraform, and cloud-native systems.',
+  icons: {
+    icon: '/rock-svg-icon.svg',
+    apple: '/rock-svg-icon.svg',
+  },
 };
 
 export default function RootLayout({