Function validate

validate(code: DocumentTypeCode, input: string): boolean
Validate input against the document type identified by code.

Internally normalizes the input (strips separators, uppercases). Returns true only if both regex shape AND check digit pass. Never throws on malformed input — use parse() if you need the failure reason.
Parameters
- code: DocumentTypeCode
  Document type to validate against (e.g. "SV_DUI").
- input: string
  Raw user input; separators and case are tolerated.
Returns boolean
true if input is a syntactically and check-digit valid document.
Throws
if code is not registered.
Example
```
import { validate } from "nationid";

validate("SV_DUI", "04567890-3");       // true
validate("SV_NIT", "06141505851012");   // true
validate("BR_CPF", "111.444.777-35");   // true
validate("BR_CPF", "111.444.777-00");   // false (bad check digit)
```
- Defined in index.ts:242