feat: added adapter custom err type (#282)

[4lessandrodev]

4lessandrodev/type-ddd#282

Example implementation

	type In = { a: number };
	type Out = { b: string };
	type Err = { err: string; stack?: string };

	class CustomAdapter implements IAdapter<In, Out, Err>{
		build(target: In): IResult<Out, Err> {
			if (typeof target.a !== 'number') return Fail({ err: 'target.a is not a number' });
			return Ok({ b: target.a.toString() });
		}
	}

	const adapter = new CustomAdapter();

Example payload

	const result = adapter.build({ a: null as any });
	expect(result.isFail()).toBeTruthy();
	expect(result.error()).toEqual({ err: 'target.a is not a number' });