add explorer.fileNesting settings for vscode

Author: midzdotdev

.vscode/settings.json

@@ -0,0 +1,6 @@
+{
+  "explorer.fileNesting.enabled": true,
+  "explorer.fileNesting.patterns": {
+    "*.ts": "${capture}.test.ts, ${capture}.test-d.ts"
+  }
+}