docs: add rranjangupta as a contributor for code

[allcontributors]

Adds @rranjangupta as a contributor for code.

This was requested by iluwatar in this comment

[skip ci]

[github-actions]

PR Summary

Adds rranjangupta as a contributor for code. Updated the All Contributors configuration and the README to reflect the new contributor, including avatar, profile, and a link to the contributor's commits. This change follows a request from a prior comment and updates the badge count accordingly. [skip ci]

Changes

File	Summary
.all-contributorsrc	Appended contributor entry for rranjangupta (Raju Gupta) with avatar, profile URL, and the code contribution to the contributors array in the All Contributors configuration.
README.md	Updated the All Contributors badge to 406 and added a new Raju Gupta entry in the contributors table with a link to the contributor's portfolio and commits.

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autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (2)

• 710f8e7: docs: update .all-contributorsrc [skip ci]
• 45a7562: docs: update README.md [skip ci]

Files Processed (2)

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

Actionable Comments (0)

Skipped Comments (3)

• .all-contributorsrc [3695-3704]

  maintainability: "Add new contributor to All Contributors config."

• README.md [9-9]

  enhancement: "Update All Contributors badge in README."

• README.md [603-603]

  enhancement: "Add contributor to README Contributors table."