vscode initial configuration (#10911)

.vscode/extensions.json

@@ -0,0 +1,11 @@
+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "ms-vscode.cpptools",
+        "github.vscode-pull-request-github",
+        "chiehyu.vscode-astyle",
+        "marus25.cortex-debug",
+        "vector-of-bool.cmake-tools"
+    ]
+}