chore: add usage clarification + revert deleted release changes

[gberenice]

what

• Updates info about the tokens usage.
• Reverts changes of the removed release (v0.1.1)

why

• Readme was confusing.
• Release v0.1.1 was removed as it contained a workaround for permission issues. They were appropriately fixed by mitigating the root cause; no WA was needed.

references

• N/A

Summary by CodeRabbit

• New Features

  • Auto-merge now auto-approves pull requests before merging, with clearer messages and retry handling.
  • GitHub token is now required; token handling simplified for more predictable behavior.
  • Improved script robustness.

• Documentation

  • README updated to “Two-Token Setup,” clarifying App token vs. code owner PAT roles, with step-by-step guidance and protected-branch caveats.
  • Removed obsolete 0.1.1 entry from CHANGELOG.

[coderabbitai]

Caution

Review failed

The pull request is closed.

Walkthrough

This PR updates documentation and the GitHub Action logic. CHANGELOG.md removes the 0.1.1 block. README.md replaces “dual-token” with “two-token setup,” renames ORG_PAT to CODE_OWNER_PAT, expands token roles, adds rationale and step-by-step instructions, and updates YAML examples accordingly. action.yml changes input requirements to make github-token required, simplifies token validation, adjusts token propagation, and modifies the auto-merge script to first approve PRs and then merge, with updated logging and stricter bash settings.

Estimated code review effort

🎯 4 (Complex) | ⏱️ ~60 minutes

Possibly related PRs

• feat: initial version #1 — Touches the same action.yml areas (inputs, approval+merge flow), indicating direct overlap in logic and behavior changes.

Suggested reviewers

• westonplatter

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📥 Commits

Reviewing files that changed from the base of the PR and between 5829528 and 90d6275.

📒 Files selected for processing (3)

• CHANGELOG.md (0 hunks)
• README.md (4 hunks)
• action.yml (6 hunks)

✨ Finishing Touches

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• Create PR with unit tests
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• Commit unit tests in branch chore/readme-clarification

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