[FEATURE] Release tool and model hooks as non-experimental

[zastrowm]

Problem Statement

As a follow-up to #231: we implemented hooks, but kept some as experimental; we need to formally release them.

In doing so:

• If possible, preserve experimental aliases to the non-experimental version
• Rename the model events to reduce verbosity:
  • BeforeToolInvocationEvent -> BeforeToolCallEvent
  • AfterToolInvocationEvent -> AfterToolCallEvent
  • BeforeModelInvocationEvent -> BeforeModelCallEvent
  • AfterModelInvocationEvent -> AfterModelCallEvent

I have a prototype of this at https://github.com/zastrowm/sdk-python/tree/mark_hooks_as_non_production

I haven't shipped it yet because I wanted to first prototype implementing retries as a hook, which might change the signature of AfterModelCallEvent

Proposed Solution

No response

Use Case

I want to be able to use Model and Tool hooks and know that they won't change release to release.

Alternatives Solutions

No response

Additional Context

No response

[zastrowm]

As part of this, consider #635 as well