Move coderabbit disclaimer to PR template and collapse walkthrough

[NaderAlAwar]

Description

closes

Checklist

• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 7a6109f1-68c4-4dbd-adaf-211134d0d139

📥 Commits

Reviewing files that changed from the base of the PR and between 5162c47 and 6661bca.

📒 Files selected for processing (1)

• .github/PULL_REQUEST_TEMPLATE.md

✅ Files skipped from review due to trivial changes (1)

• .github/PULL_REQUEST_TEMPLATE.md

---

📝 Walkthrough

Summary by CodeRabbit

• Documentation
  • Updated the pull request template with a note clarifying that CodeRabbit’s suggested review comments are optional and that final merging decisions are made by human reviewers.
• Chores
  • Adjusted the review walkthrough UI to collapse walkthrough content by default for a more compact review experience.

Walkthrough

The PR updates CodeRabbit walkthrough collapse behavior in .coderabbit.yaml and adds a PR template note stating that CodeRabbit is enabled and its suggestions are optional.

Changes

CodeRabbit repository metadata

Layer / File(s)	Summary
Walkthrough collapse setting .coderabbit.yaml	collapse_walkthrough is changed from false to true.
PR template note .github/PULL_REQUEST_TEMPLATE.md	A note is added saying CodeRabbit is enabled and its suggested changes may be ignored by contributors.

---

_{Comment @coderabbitai help to get the list of available commands.}