Recommended vscode extensions

.vscode/extensions.json

@@ -0,0 +1,9 @@
+{
+  "recommendations": [
+    "dbaeumer.vscode-eslint",
+    "ms-vscode.vscode-typescript-tslint-plugin",
+    "esbenp.prettier-vscode",
+    "bierner.lit-html",
+    "runem.lit-plugin"
+  ]
+}