no-unnecessary-class: false positive with decorated classes

[unlight]

Very common case in nestjs framework.

@Module({
    controllers: [HelloController],
    providers: [],
})
export class HelloModule {}

[JoshuaKGoldberg]

Indeed! It'd be great to have a feature on the rule to allow decorated classes.

[IllusionMH]

As I can see - no-unnecessary-class is part of core rules. (no-stateless-class was deprecated in favor of core rule)

@JoshuaKGoldberg maybe it make sense to create feature request in palantir/tslint repo? I can do it if needed.

To avoid error in provided case - it is possible to use "allow-empty-class" option, it will remove error is this case (but no error for classes with decorators)

[JoshuaKGoldberg]

Indeed, thanks for pointing this out @IllusionMH!

Closing this issue in favor of us deprecating no-unnecessary-class.

[JoshuaKGoldberg]

Also see palantir/tslint#1142 and #504