Use Case

As a... mongoose user
I want... I want to be able to specify which fields I want encrypted and how
So that... I can use field-level encryption in an idiomatic way 

Acceptance Criteria

Implementation Requirements

• On construction, the Schema constructor 
  • parses the input from the user and extracts any encrypted fields into a separate field, encryptedFields.  see the schema section of the design for details.
  • Determines the encryption type (queryable encryption or CSFLE).  
  • see the schema section of the design for details.
• Schema mutation methods will be updated to update the encrypted fields map if new encrypted fields are added / removed.  This applies to:
  • add()
  • remove()
• Validation
  • Will be done in NODE-6628
• Typescript support
  • Will be done in NODE-6627
• Merge to mongodb mongoose fork for now

Testing Requirements

• Test that data is stored correctly
• Throw on incorrect configruation

Documentation Requirements

• API docs

Follow Up Requirements

• Mongoose Docs update to include CSFLE/QE