chore(README): add the supported locales for various validators

Description

Contributor guide

Tech stack

javascript

Domain

documentationlocalization

Issue type

chore

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

1

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

under 1 hour

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

stale

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

clear

Prerequisites

None

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

95

Research direction

Review the current README to see how locales are documented. Examine source files (e.g., in src/lib/) for validators like isPassportNumber to compile supported locales. Update the README with the list. Check issue comments for any maintainer guidance.