feat(obs): basic agent instrumentation

[zebp]

Adds a new observability property to Agents that receives events during the Agent's exeuction that can be used for configurable observability. The default observability implementation prints the events to console, but in the future this could be hooked up to a UI or some other observability tooling.

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: 5aee5a75dd66885615de2de897917cda6c977db1

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 2 packages

Name	Type
agents	Patch
hono-agents	Patch

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