Initial commit: castle personal software platform

Add three submodules (central-context, mboxer, notification-bridge),
devbox-connect as tracked files, and top-level project docs.

devbox-connect/service/run-manual.bat

@@ -0,0 +1,19 @@
+@echo off
+REM run-manual.bat - Run devbox-connect manually (not as a service)
+REM
+REM Usage:
+REM   run-manual.bat                     - Uses tunnels.yaml in current directory
+REM   run-manual.bat C:\path\to\config   - Uses specified config file
+
+setlocal
+
+set CONFIG=%1
+if "%CONFIG%"=="" set CONFIG=tunnels.yaml
+
+echo Starting devbox-connect with config: %CONFIG%
+echo Press Ctrl+C to stop
+echo.
+
+devbox-connect -c "%CONFIG%" start
+
+pause