Implement GET listens endpoint

[VoxSecundus]

No description provided.

[Copilot]

Pull Request Overview

This PR implements a new GET listens endpoint that allows users to retrieve their listen history from ListenBrainz with optional filtering parameters.

Key changes:

• Added listens method to UserClient with support for timestamp and count filtering
• Refactored the API client to use a more generic get method instead of api_call
• Added comprehensive test coverage for the new functionality

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
lib/overhear/clients/client.rb	Renamed api_call to get and added query parameter support
lib/overhear/clients/user_client.rb	Implemented listens method and updated existing methods to use new get method
sig/overhear.rbs	Updated type signatures to reflect API changes
test/test_user_client.rb	Added comprehensive test coverage for the new listens method

Comments suppressed due to low confidence (1)

test/test_user_client.rb:24

• The parameter _params should be named params since it's actually used in the method body (line 46). The underscore prefix indicates an unused parameter.

      def get(_endpoint, _headers, _params = {})