Merge Async Failure Additions plugin into core package

[jongpie]

@jamessimone I'd love to know your thoughts on this one - I'd like to merge your Async Failure Additions plugin into the core package so that out of the box, Nebula Logger...

• Automatically handles logging all BatchApexErrorEvent records
• Automatically handles logging all FlowExecutionErrorEvent records
• Provides a ready-to-use implementation for System.Finalizer

I think that'd be really convenient for every org to just automatically have that functionality without needing to install an extra package. Any concerns with deprecating the plugin package & moving the metadata into core?

[jamessimone]

The only concern I have is if existing implementations already have a BatchApexErrorEvent handler - I guess since this is feature-flagged, as is, it should be fine!

[jongpie]

Yeah, that concern makes sense, maybe the config should be disabled by default? I'll try to tinker with this idea more in the coming weeks