Add run button for target configurations

[Olster]

Description

I can run a target using nx-console plugin when opening project.json, but sometimes I need to run a configuration of a target and need to do it via CLI.

Motivation

Since there's already a button to run a target, and you can see configurations when you open the target, it would be useful to be able to run a configuration with a button click instead of opening a terminal and using CLI.

Suggested Implementation

Next to target configuration button, there would be a play button, just like for the target.

Alternate Implementations

Add copy button to copy the command that I need to run in CLI, including target configuration name.