[FEATURE] Add date validator generator (ISO and BR)

1. Request Type

• ✨ Feature Request

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2. General Description

This issue proposes adding a new regex generator to the project: Date validators for ISO (YYYY-MM-DD) and BR (DD/MM/YYYY) formats with an optional strict mode to validate month/day ranges including leap years.

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3. Specific Information

• Problem to Solve: Date inputs need consistent validation; a generator simplifies reuse across forms.
• Suggested Solution: Implement generateDateRegex(options) with options like format ('iso'|'br') and strict (boolean). For strict=true, either create a comprehensive regex covering month lengths and leap years or suggest additional JS validation after regex match.

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Important:

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