Convert dangrubb.net to Astro framework

- Migrated main site, blog, CV, and music sections to Astro
- Component-based architecture with layouts
- JSON-based blog posts
- Static site generation
- Preserved original styling and functionality

package.json

@@ -0,0 +1,17 @@
+{
+  "name": "dangrubb-astro",
+  "type": "module",
+  "version": "0.0.1",
+  "engines": {
+    "node": ">=22.12.0"
+  },
+  "scripts": {
+    "dev": "astro dev",
+    "build": "astro build",
+    "preview": "astro preview",
+    "astro": "astro"
+  },
+  "dependencies": {
+    "astro": "^6.1.9"
+  }
+}