Add OAS for /signer/list and /login/nonce

[Shreyaschorge]

Description of the Change

OAS Change Summary

Add 2 new endpoints

New Endpoints

• GET /v2/farcaster/login/nonce - Fetch nonce to sign message
• GET /v2/farcaster/signer/list - Fetch signer list for a custody address

New/Updated Schemas

• NewSchema - Schema for a new resource.
• UpdatedSchema - Modified to include additional fields.

Checklist

• I have validated that all new/updated endpoints conform to OAS standards.
• I have updated or added necessary schema definitions.
• I have ensured that the new schema I have added doesn't exist.
• I have added description wherever necessary.
• I have ensured that endpoint's responses are correct.
• I have considered backward compatibility with previous versions of the API.
• I have communicated any breaking changes to the appropriate stakeholders.
• I have tested the OAS changes using a tool like Swagger editor

Additional Comments