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.

tsconfig.json

@@ -0,0 +1,3 @@
+{
+  "extends": "astro/tsconfigs/strict"
+}