[FEATURE] Add note about dependencies where add is documented for CLI

[briandoyle81]

Issue to be solved

If you're not familiar with the CLI, it's easy to find the page for and conflate flow config add contract with flow dependencies install...

Suggest A Solution

Add an info box here: https://developers.flow.com/tools/flow-cli/flow.json/manage-configuration

linking to:

https://developers.flow.com/tools/flow-cli/dependency-manager

What are you currently working on that this is blocking?

No response