indexer-cli: add `deployments` module

Background

The Indexer-cli currently provides functionality for many important indexer operations. Ultimately the goal is to identify operations that currently need to be done outside of indexer-cli and merging them into indexer-cli functionality. Currently the indexer-cli provides tooling for: managing allocations, applying business strategy using indexing rules and the actions queue, and managing cost models. Another major area of focus for indexers is the management of deployments which can currently be done using the admin JSON-RPC endpoint on the graph-node, or using the graphman cli tool. There is an ongoing project to move graphman functionality into a GraphQL endpoint that can be called by other components. Once this work is completed it will open up the possibility to extend the indexer-cli to cover these deployment management commands.

Goal

Provide deployment management interface in the indexer-cli. For gathering data on deployments as well as managing them.

Some functionality we'll want to include:

• mutations
  • deploy
  • reassign
  • unassign
  • rewind
  • drop
  • unused record
  • unused remove
  • account-like optimization
• queries
  • info

Start by reviewing the existing indexer-cli command structure and the graph-node graphman-to-GraphQL work linked in the issue. Done means defining and implementing the listed deployment queries and mutations through indexer-cli, covering both deployment data gathering and management.