Add SSL Verification Options and Improved Certificate Handling (#817)

* Add SSL verification configuration option

- Add `verify_ssl` parameter to DownloadsConfig to control SSL certificate verification
- Update client methods to use the new SSL verification setting
- Add CLI option `--no-ssl-verify` to disable SSL verification
- Implement SSL verification support across various clients and network requests
- Add test suite to validate SSL verification configuration

* Enhance SSL certificate handling with certifi support

- Add new `ssl_utils.py` module for SSL certificate management
- Implement optional certifi package support for improved certificate verification
- Add utility functions for creating SSL contexts and handling connector kwargs
- Update various clients to use new SSL utility functions
- Add helpful error messaging for SSL certificate verification issues
- Include optional certifi dependency in pyproject.toml

* Enhance SSL verification tests and configuration support

- Add comprehensive test suite for SSL verification utilities
- Implement tests for SSL context creation and configuration
- Update test configuration to include verify_ssl option
- Add test coverage for SSL verification across different clients and methods
- Improve error handling and testing for SSL-related configurations

* run ruff format

* Fix ruff checks

---------

Co-authored-by: Nathan Thomas <nathanthomas707@gmail.com>

tests/test_config.py

@@ -163,6 +163,7 @@ def test_sample_config_data_fields(sample_config_data):
             concurrency=True,
             max_connections=6,
             requests_per_minute=60,
+            verify_ssl=True,
         ),
         qobuz=QobuzConfig(
             use_auth_token=False,