Add Castle documentation content

- Emergency procedures (fire, medical, weather, utilities)
- Equipment guides (tractor, heating, kitchen, tools)
- Getting started (house rules, FAQ, supplies)
- Infrastructure docs (electrical, water, internet, heating)
- Spaces overview (main building, outbuildings, outdoor)

content/infrastructure/index.md

@@ -0,0 +1,31 @@
+---
+title: Infrastructure
+description: Electrical systems, water, heating, and utilities documentation
+aliases:
+  - infrastructure
+tags:
+  - infrastructure
+  - utilities
+---
+
+# Infrastructure
+
+Documentation for the property's core systems and utilities.
+
+## Sections
+
+- [[electrical|Electrical & Circuit Breakers]]
+- [[water|Water System]]
+- [[heating-system|Heating System Overview]]
+- [[internet|Internet & Communications]]
+
+## Quick Reference - Shutoff Locations
+
+| System | Main Shutoff Location |
+|--------|----------------------|
+| Electricity | *TBD* |
+| Water | *TBD* |
+| Gas (if applicable) | *TBD* |
+
+> [!warning] Emergency Shutoffs
+> All residents should know the location of main shutoffs. Review this section when you arrive.