ev3/snippets/bluetooth_pc: hello world launch

This creates an empty hello world style Python3 example

snippets/ev3/bluetooth_pc/.vscode/launch.json

@@ -0,0 +1,15 @@
+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "PC Bluetooth Example",
+            "type": "python",
+            "request": "launch",
+            "program": "pcserver.py",
+            "console": "integratedTerminal"
+        }
+    ]
+}

snippets/ev3/bluetooth_pc/pcserver.py

@@ -0,0 +1,2 @@
+#!/usr/bin/env python3
+print("Hello, world!")