feat: add defaultInterpreterPath as a vscode setting as a starting point according to docs (#1358)

See: https://github.com/microsoft/vscode-python/wiki/Setting-descriptions#pythondefaultinterpreterpath

development/vscode-example/settings.json

@@ -0,0 +1,3 @@
+{
+  "python.defaultInterpreterPath": "${workspaceFolder}/frappe-bench/env/bin/python"
+}