Truststore

* Fixed an issue for CPython 3.13 where `ssl.SSLSocket` and `ssl.SSLObject` certificate
chain APIs would return different types.

* Added support for Python 3.13.
* Fixed loading additional certificates on macOS.
* Changed error message for Windows when peer offers no certificates
and verification is enabled. Previously was `IndexError`, now is `SSLCertVerificationError`.

* Added support for PyPy 3.10 and later.

* Changed the error raised when using an unsupported macOS version (10.7 or earlier) from an `OSError` to an `ImportError`
to match the error raised in other situations where the module isn't supported.

* Fixed issue where a `RecursionError` that would be raised when setting `SSLContext.minimum_version` or `.maximum_version`.

* **Truststore is now beta! Truststore will be made the default in a future pip release**.
* Added `inject_into_ssl()` and `extract_from_ssl()` to enable Truststore for all
packages using `ssl.SSLContext` automatically.
* Added support for setting `check_hostname`, `verify_mode`, and `verify_flags`.
* Added pass-through implementations for many `ssl.SSLContext` methods like
`load_cert_chain()`, `set_alpn_protocols()`, etc.