feat: add helpers to fetch all RFQ requests and quotes

[maginboobr]

Summary

This PR adds two convenience methods to RfqClient:

• getAllRfqRequests
• getAllRfqQuotes

Both helpers iterate through the paginated RFQ API using next_cursor and
END_CURSOR, aggregating data from all pages into a single array.

Motivation

Currently, getRfqRequests and getRfqQuotes only return a single page of
results and require client code to implement pagination manually. These helpers
provide an ergonomic way to fetch all RFQ requests or quotes without changing
the existing API surface.

Implementation details

• Reuse existing L2 auth (createL2Headers) and parameter parsing
  (parseRfqRequestsParams, parseRfqQuotesParams).
• Loop until next_cursor === END_CURSOR and concatenate response.data.
• No breaking changes: existing methods are kept as-is.

---

Note

Adds getAllRfqRequests and getAllRfqQuotes to iterate cursor-based pagination and return aggregated results.

• RfqClient:
  • New helpers: getAllRfqRequests, getAllRfqQuotes iterate via next_cursor until END_CURSOR, aggregating response.data.
  • Reuses createL2Headers and param parsers (parseRfqRequestsParams, parseRfqQuotesParams); introduces use of INITIAL_CURSOR/END_CURSOR.

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