v6 - using populate true in find returns wrong reference type

[boopeshmahendran227]

Describe the bug
using populate true in find returns wrong reference type

export class User extends BaseEntity {
  @OneToOne(() => JobSeeker, (e) => e.user, { nullable: true, ref: true })
  jobSeeker!: Ref<JobSeeker> | null;
}

const user = await this.em.findOneOrFail(User, userId, {
  populate: true,
});
if (!user.jobSeeker) {
  throw new BadRequestException('JobSeeker not found');
}
const x = user.jobSeeker.$.city;

Error:
Property '$' does not exist on type '{} & Reference'

But when i use populate: ['jobSeeker'] it works

[B4nan]

This is actually pretty hard to fix (spent the whole afternoon on this yesterday and it's still not done) due to the populate hint being string | boolean instead of just string, it breaks the inference heavily.

I wonder if it would be better to remove the boolean signature in favor of populate: '*', which is what the partial loading hint is using anyway.

edit: we could even keep it as is so its not breaking, but only respect populate: '*' in the Loaded type

[B4nan]

I will end up with populate: ['*'], that's the only way I can keep all the connected types working correctly, at least without adding a lot of method overrides.