Function err

err<E>(value: E): Err<E>
Creates a Result.Err containing the given error value.

Use this constructor when an operation fails and you want to wrap the error information in a Result type for consistent error handling.
Type Parameters
- E
  The type of the error value.
Parameters
- value: E
  The error value.
Returns Err<E>
A Result.Err<E> containing the value.
Example
```
const success = Result.ok({ id: 1 });
const failure = Result.err(new Error('missing data'));

assert.deepStrictEqual(success, {
  $$tag: 'ts-data-forge::Result.ok',
  value: { id: 1 },
});
assert.ok(Result.isErr(failure));
```
- Defined in src/functional/result.mts:186