✨ [FEATURE] Added Auto Configurer

[furkandeveloper]

Summary

This PR includes added auto configurer for cron jobs.

How to use?

** Step 1

Define your cron job

** Step 2

Install EasyCronJob.AutoConfigurer nuget package

** Step 3

Configure Cron Jobs with Startup.cs

public void ConfigureServices(IServiceCollection services)
{
    services.InitializeCronServices();
    services.AutoConfigurer();
}

---

** NOTE **
This PR includes new feature. This feature has been requested by community members.
See #23 for more information

[enisn]

I recommend to use Assembly.GetEntryAssembly().GetReferencedAssemblies() here.

This'll ignore 2nd level references. So, unwanted registrations can be prevented.

[furkandeveloper]

Thanks for the suggestion.
Could you give some more detailed information about the risks?
@enisn

[enisn]

In an example, I'm using EasyCronJob in my library and I have a couple of CronJobService, but I only register only one of them. Or I'm configuring them according to a condition, my code picks one of my CronJobService and registers it according to a condition.

If your application has that autoconfiguration and depends on my library, you'll register all of my CronJobServices in my library and all app domain assemblies too, even if I don't want to register all of them.