docs: add PR review guidelines link to README

[De-real-iManuel]

Summary

Adds a new ## Pull Request Reviews section to README.md with a link to the PR review guidelines document, making it easy for community contributors to find the guide.

Changes

• Added ## Pull Request Reviews section to README.md after ## Contributions
• Link points to the full GitHub URL of docs/sdk_developers/pr_review_guidelines.md

Fixes #2277

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro

Run ID: 3c763cc4-2b33-4b54-a399-ed63ce801c66

📥 Commits

Reviewing files that changed from the base of the PR and between 312db19 and da631c7.

📒 Files selected for processing (1)

• README.md

---

Walkthrough

The pull request adds a new "Pull Request Reviews" section to README.md that invites community reviews and provides a direct link to PR review guidelines documentation in the docs/sdk_developers directory.

Changes

PR Review Guidelines Documentation

Layer / File(s)	Summary
Pull Request Reviews section README.md	A new README section welcomes community code reviews and links to the PR review guidelines documentation for reviewers.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title directly and clearly describes the main change: adding a PR review guidelines link to the README.
Description check	✅ Passed	The description is relevant and provides details about the changes made, including the new section added and the issue being fixed.
Linked Issues check	✅ Passed	The PR successfully implements all coding requirements from issue #2277: adds a Pull Request Reviews section to README after Contributions, includes a link to the PR review guidelines document, and references the issue with 'Fixes #2277'.
Out of Scope Changes check	✅ Passed	All changes are within scope—only the README.md was modified to add the PR review guidelines link as specified in issue #2277, with no unrelated alterations.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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[tech0priyanshu]

@De-real-iManuel Thanks for Contribution.

[De-real-iManuel]

Thank you @tech0priyanshu for the assistance.

[aceppaluni]

@De-real-iManuel This is looking good and almost ready to merge.

Please update your branch and then well merge, thank you!

[De-real-iManuel]

I have updated my branch you can merge now. @aceppaluni

[github-actions]

👋 Hi @De-real-iManuel! Great work completing a Good First Issue issue! 🎉

Thanks for your contribution! 🚀

Here are some issues you might want to explore next:

• feat: Add arithmetic operators to Hbar (+, -, abs)

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Happy coding! 🚀
— Hiero Python SDK Team