Integrate G15 submodules with Debian 13 packaging and devcontainer

.devcontainer/devcontainer.json

@@ -0,0 +1,9 @@
+{
+  "name": "G15 Debian 13",
+  "dockerComposeFile": ["compose.yaml", "compose.usb.yaml"],
+  "service": "dev",
+  "workspaceFolder": "/work",
+  "initializeCommand": ["bash", "${localWorkspaceFolder}/.devcontainer/initialize.sh"],
+  "overrideCommand": false,
+  "shutdownAction": "stopCompose"
+}