Implement .cleanup-ignore support in cleanup.yml workflow

[d-oit]

This change implements full support for the .cleanup-ignore file within the .github/workflows/cleanup.yml workflow.

Previously, the workflow only had hardcoded exceptions and ignored the .cleanup-ignore file mentioned in its PR body template. The updated logic:

1. Reads .cleanup-ignore at the start of the detection step.
2. Gracefully handles comments (#) and empty lines.
3. Excludes any script if its basename or relative path matches an entry in the ignore file.
4. Tracks and reports the number of skipped files in the GitHub Action step summary.

This fix ensures that scripts like scripts/pre-commit-hook.sh (which are currently listed in .cleanup-ignore) are no longer incorrectly flagged for deletion.

Fixes #424

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PR created automatically by Jules for task 12929004119878635715 started by @d-oit

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Project	Deployment	Actions	Updated (UTC)
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DeepSource Code Review

We reviewed changes in 3fd6c20...dfb2eba on this pull request. Below is the summary for the review, and you can see the individual issues we found as inline review comments.

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Code Review Summary

Analyzer	Status	Updated (UTC)	Details
JavaScript		Jun 7, 2026 8:15a.m.	Review ↗
Python		Jun 7, 2026 8:15a.m.	Review ↗
Rust		Jun 7, 2026 8:15a.m.	Review ↗
Shell		Jun 7, 2026 8:15a.m.	Review ↗

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