feat: expose Response Headers

[esroyo]

We need to Expose the Response Headers to the consumers of the library.

[Copilot]

Pull Request Overview

This PR exposes HTTP response headers to library consumers by adding a Headers field to the Response struct and populating it with the HTTP response headers.

• Added a Headers field to the Response struct to store HTTP response headers
• Populated the Headers field with response headers from the HTTP response

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
response.go	Added Headers field to Response struct to store HTTP response headers
request.go	Populated Headers field with HTTP response headers from the HTTP response

Comments suppressed due to low confidence (1)

response.go:24

• [nitpick] The field name 'Headers' should follow Go naming conventions and be 'HTTPHeaders' or 'ResponseHeaders' to be more descriptive, as 'Headers' could be ambiguous about whether these are request or response headers.

	Headers                map[string][]string // The HTTP Response headers