Added Databricks CLI version as part of routed command telemetry (#147)

Fix #141

Author: nfx

src/databricks/labs/blueprint/__init__.py

@@ -1,5 +1,11 @@
+import os
+
 from databricks.sdk.core import with_user_agent_extra
 
 from .__about__ import __version__
 
 with_user_agent_extra("blueprint", __version__)
+
+cli_version = os.environ.get("DATABRICKS_CLI_VERSION")
+if cli_version:
+    with_user_agent_extra("cli", cli_version)