Update adding GenerationOptions and loading Transcript

This update adds support for GenerationOptions and makes it possible to load a Transcript from a dictionary and start a LanguageModelSession from a prior Transcript. Also adds some improvements to the @fm.generable decorator to be more flexible.

First release published on PyPi

This release adds some polish to the README and build scripts and updates everything for our new pip install instructions from PyPi: pip install apple-fm-sdk.

First beta release 🎉

Introducing Python bindings for access to the on-device model at the core of Apple Intelligence through the Foundation Models framework.