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/pyproject.toml

@@ -0,0 +1,31 @@
+[project]
+name = "devbox-connect"
+version = "0.1.0"
+description = "SSH tunnel manager for connecting to devbox ports"
+readme = "README.md"
+requires-python = ">=3.10"
+dependencies = [
+    "paramiko>=3.4.0",
+    "pyyaml>=6.0",
+]
+
+[project.scripts]
+devbox-connect = "devbox_connect.cli:main"
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/devbox_connect"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py310"
+
+[tool.ruff.lint]
+select = ["E", "F", "I", "W"]
+
+[tool.pyright]
+pythonVersion = "3.10"
+typeCheckingMode = "standard"