[Server] Explicitly document the cursor option of the listIndexes command

Description

The listIndexes command documentation is missing the documentation for cursor option, which allows the user to specify a batch size for the results.

Please explicitly add "cursor" as an option for this command, with the description that it takes a document

{batchSize: N}

where N is the desired batch size.

Please also amend the output description for "listIndexes.cursor", mentioning to use the getMore command to retrieve additional results if the cursor is non-zero.

Scope of changes

Impact to Other Docs

MVP (Work and Date)

Resources (Scope or Design Docs, Invision, etc.)