fix: prevent example collection crash for readme_generator

[planetf1]

fix: prevent example collection crash for readme_generator

Type of PR

• Bug Fix
• New Feature
• Documentation
• Other

Description

• Link to Issue: Fixes example_readme_generator.py crashes at pytest collection time #592

Fixes: #592

This PR addresses a collection-time crash where the readme generator example attempted to initialize an Ollama backend during discovery.

Changes:

1. Wrapped the generator call in a main guard to prevent execution during import, aligning with other complex examples. (this would avoid the crash. strictly not needed now due to 2. below, but is consistent with other examples)
2. Patched the example configuration file to respect the skip marker during collection, ensuring skipped files are bypassed. (this was the actual cause of the crash)

Verified locally with collect-only.

Testing

• Tests added to the respective file if code was changed (N/A - test infra)
• New code has 100% coverage if code as added
• Ensure existing tests and github automation passes (a maintainer will kick off the github automation when the rest of the PR is populated)

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