Integrate with the new wpai_is_{$slug}_connector_configured filter

[dkotter]

Description of the Change

The AI plugin doesn't see the Ollama Connector as being connected within the status dashboard widget since it doesn't require an API key. A new wpai_is_{$slug}_connector_configured filter is being introduced in that plugin that allows individual Connectors to override this behavior.

This PR hooks into that filter and if we have models available, we assume Ollama is connected and return true. This matches what we added in #43

Closes #54

How to test the Change

1. Install the AI plugin from New filter in the status dashboard widget to set configured status WordPress/ai#473
2. Pull this PR down
3. Go to the admin dashboard and ensure Ollama shows as connected in the status widget

Changelog Entry

Added - Ensure the AI plugin sees Ollama as a valid, connected provider within the status dashboard widget

Credits

Props @dkotter, @jeffpaul

Checklist:

• I agree to follow this project's Code of Conduct.
• I have updated the documentation accordingly.
• I have added Critical Flows, Test Cases, and/or End-to-End Tests to cover my change.
• All new and existing tests pass.

[jeffpaul]

Tested and confirmed working as expected, thanks!