Add cmake-tools to default C++ container? (#1167)

Author: jureid

containers/cpp/.devcontainer/devcontainer.json

@@ -13,7 +13,8 @@
 
 	// Add the IDs of extensions you want installed when the container is created.
 	"extensions": [
-		"ms-vscode.cpptools"
+		"ms-vscode.cpptools",
+		"ms-vscode.cmake-tools"
 	],
 
 	// Use 'forwardPorts' to make a list of ports inside the container available locally.
@@ -24,4 +25,4 @@
 
 	// Comment out connect as root instead. More info: https://aka.ms/vscode-remote/containers/non-root.
 	"remoteUser": "vscode"
-}
+}