As part of the project, we have to implement the checks for consistent indexes. The main goal of this ticket to check that indexes are consistent across shards:

• A sharded collection has an inconsistent index if the collection does not have the exact same indexes (including the index options) on each shard that contains chunks for the collection.
• Inconsistent indexes can occur, when a user is creating an index with a unique key constraint and one shard contains a chunk with duplicate documents.