docs: add smile-ab as a contributor for code

[allcontributors]

Adds @smile-ab as a contributor for code.

This was requested by iluwatar in this comment

[skip ci]

[github-actions]

PR Summary

Added smile-ab as a code contributor to the project. Updated .all-contributorsrc to include code contributions and README.md to reflect the change in contributor status.

Changes

File	Summary
.all-contributorsrc	Added "code" to smile-ab's contributions in the .all-contributorsrc file. This reflects their contributions to the project's codebase.
README.md	Updated the README.md file to include a code contribution icon next to smile-ab's name in the contributors table. This visually represents their code contributions.

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autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (2)

• 5eae951: docs: update .all-contributorsrc [skip ci]
• aa0de4e: docs: update README.md [skip ci]

Files Processed (2)

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

Actionable Comments (0)

Skipped Comments (0)

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

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

See analysis details on SonarQube Cloud