How to include 3rd party CLI dependency as part of building an extension.

### Description of issue (in as much detail as possible)

We are trying to build an az cli extension for dapr(docs.dapr.io). For this we need to install `dapr cli` binary as a dependency.
Is there any recommendation or standard we follow on how to install 3rd party dependencies which **does not export Pypi packages**?

For example, I see some of the extensions install `kubectl` cli as a dependency. Similar to that our new extension will also depend on [Dapr CLI](https://github.com/dapr/cli) to execute certain commands.