docs: add mehdirahimi as a contributor for code

[allcontributors]

Adds @mehdirahimi as a contributor for code.

This was requested by iluwatar in this comment

[skip ci]

[github-actions]

PR Summary

Added Mehdi Rahimi as a code contributor to the project. Updated the .all-contributorsrc file to include Mehdi Rahimi's contribution information and updated the README.md file to reflect the change in the total number of contributors and to add Mehdi Rahimi to the contributors list.

Changes

File	Summary
.all-contributorsrc	Added Mehdi Rahimi to the list of contributors with "code" contribution type. Updated the contributor count accordingly.
README.md	Updated the All Contributors badge to reflect the new contributor count (370). Added Mehdi Rahimi to the contributors table with a link to his GitHub profile and contribution type.

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autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (2)

• 5bf7fd4: docs: update .all-contributorsrc [skip ci]
• 85f6ca7: docs: update README.md [skip ci]

Files Processed (2)

• .all-contributorsrc (1 hunk)
• README.md (2 hunks)

Actionable Comments (0)

Skipped Comments (0)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud