Move extensions.json out of PR intersystems-community#183

Author: gjsjohnmurray

.vscode/extensions.json

@@ -0,0 +1,7 @@
+{
+  "recommendations": [
+    "esbenp.prettier-vscode",
+    "dbaeumer.vscode-eslint",
+    "EditorConfig.EditorConfig"
+  ]
+}