Function and

and(res: ExtRegex[]): ExtRegex
Constructs a regex that matches the intersection of all input regex. This operator has no analog in standard regular expressions, so the return type is always an ExtRegex.

NOTE: This is just a cheap constructor. There is no heavy computation until you call toStdRegex.
Parameters
- res: ExtRegex[]
Returns ExtRegex
Example
```
import { and, parse } from '@gruhn/regex-utils/low-level-api'

const passwordRegex = and(
  parse(/.{12,}/), // 12 letters or more
  parse(/[0-9]/),  // at least one number
  parse(/[A-Z]/),  // at least one upper case letter   
  parse(/[a-z]/),  // at least one lower case letter
)
```
- Defined in regex.ts:404