feat: add InjectMikroORMs inject decorator

[tsangste]

Create an inject decorator for multiple mikro-orms

[B4nan]

What is this good for?

[tsangste]

What is this good for?

Kind of a follow on from #88 where instead of doing:

@Injectable()
export class MyService {

  constructor(@Inject('MikroORMs') private readonly orms: MikroORM[]) { }

}

we can do:

@Injectable()
export class MyService {

  constructor(@InjectMikroORMs() private readonly orms: MikroORM[]) { }

}

which makes it look nicer and less strings.

I can also add it within the README.md too if that help?

[B4nan]

Yes, but what is that good for?

[tsangste]

Yes, but what is that good for?

Its just a helper and just gives us these benefits:

• Consistency with the other helper (even those they are used for context names)
• Less risk of typos for the string name
• Intellisense

[B4nan]

Once again, what is this good for? Why would you as a user want this? I understand what you did there, I am asking for what use case? Its not documented anywhere, neither the explicit @Inject('MikroORMs') nor this new version.

[tsangste]

Once again, what is this good for? Why would you as a user want this? I understand what you did there, I am asking for what use case? Its not documented anywhere, neither the explicit @Inject('MikroORMs') nor this new version.

Sorry I understand now, we basically want an easy way to get all registered database so we can do the following:

• Get all databases for health checks
• Multiple Multi-Tenancy database to apply setFilterParams

This would make it easier than having to manually add a new InjectMikroORM for every new database.

[tsangste]

@B4nan updated based off your review