Initial commit: Birdcage documentation site

Starlight/Astro docs covering hardware reverse engineering,
satellite tracking guides, firmware command reference, and
engineering journal entries from the Carryout G2 exploration.

32 pages across getting-started, guides, reference,
understanding, and journal sections.

astro.config.mjs

@@ -0,0 +1,45 @@
+import { defineConfig } from 'astro/config';
+import starlight from '@astrojs/starlight';
+
+export default defineConfig({
+  telemetry: false,
+  devToolbar: { enabled: false },
+  integrations: [
+    starlight({
+      title: "Birdcage",
+      description: 'Winegard satellite dish control for amateur radio sky tracking',
+      social: [
+        {
+          icon: 'github',
+          label: 'GitHub',
+          href: 'https://github.com/saveitforparts/Travler_Rotor',
+        },
+      ],
+      customCss: ['./src/styles/custom.css'],
+      sidebar: [
+        { label: 'Home', link: '/' },
+        {
+          label: 'Getting Started',
+          autogenerate: { directory: 'getting-started' },
+        },
+        {
+          label: 'Guides',
+          autogenerate: { directory: 'guides' },
+        },
+        {
+          label: 'Reference',
+          autogenerate: { directory: 'reference' },
+        },
+        {
+          label: 'Understanding',
+          autogenerate: { directory: 'understanding' },
+        },
+        {
+          label: 'Project Journal',
+          badge: { text: 'Living', variant: 'note' },
+          autogenerate: { directory: 'journal' },
+        },
+      ],
+    }),
+  ],
+});