ci: add the apify-factory review workflow

[apify-service-account]

Lets apify-factory review pull requests here and approve the trivial ones.

• Requesting apify-factory as a reviewer runs an AI review; when every gate passes, the review finds nothing and a second model agrees, it approves instead of commenting.
• A push that changes the code, removing the request, or going back to draft withdraws the bot's own approval.
• This repository's factory_auto_approve property is true, which is what allows approvals, and mtrunkat becomes the code owner of the workflow file.
• These paths are never auto-approved here, on top of the defaults every repository has. An agent proposed them from the repository's layout; edit the list in the workflow like any other code.

Path	Why	Files
**/pyproject.toml	Python package manifest declaring dependencies, build backend and the published PyPI package contents; the Python counterpart of the already-denied package.json/setup.py.	1

Refs https://github.com/apify/ai-developer/blob/main/actions/auto-approve/README.md