docs: add AnveshSrivastava as a contributor for code

[allcontributors]

Adds @AnveshSrivastava as a contributor for code.

This was requested by iluwatar in this comment

[skip ci]

[github-actions]

PR Summary

Adds AnveshSrivastava as a contributor for code. Updates the All Contributors configuration (.all-contributorsrc) and README badge to reflect the new contributor.

Changes

File	Summary
.all-contributorsrc	Added a new contributor entry for AnveshSrivastava with login, name, avatar_url, profile, and contributions including code to the contributors list.
README.md	Updates All Contributors badge count from 412 to 413 and adds a new contributor cell for AnveshSrivastava in the contributors table, including avatar, name, GitHub link, and code contribution.

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autogenerated by presubmit.ai

[github-actions]

✅ LGTM!

Review Summary

Commits Considered (2)

• 61c813f: docs: update .all-contributorsrc [skip ci]
• 83bc107: 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 [3760-3767]

  maintainability: "Add new contributor entry: validate contributor metadata"

• README.md [9-9]

  enhancement: "Update All Contributors badge count"

• README.md [613-613]

  readability: "Add contributor tile to README avatars table"