Making TypeProviders easier: FS3033 needs base exception message

[Thorium]

When I'm using different type-providers (a lot) and they use external dependency dlls, which throw an error, the F# compiler throws generic FS3033: The type provider '%s' reported an error: %s

The error is typically: "The type initializer for 'some.dll' threw an exception."

What I would like to get is, if the inner-exception is not null (usually not) then .GetBaseException().Message of that too, like: FS3033: The type provider '%s' reported an error: %s ...with details: %s

The workaround most developers do:

• Open issue to corresponding TypeProvider's repo
• Curse both F# and TypeProviders
• And wait the author to debug, meanwhile continue writing their C#.

The workaround I do:

• Download the TypeProvider from the GitHub,
• Compile it in debug-mode
• Replace my NuGet cache dll files with built debug-versions
• Then open the TP project and attach VS to my process throwing the error
• ...and yes I do get the error, which is typically very simple to fix once you know it. Typically just another dll missing:

A simple fix would already had kept many devs in F#.

[abelbraaksma]

I think this makes sense and is likely a simple change to do. I do use TPs and indeed, if they fail, it can be hard to diagnose.

[smoothdeveloper]

related to #4978

[Thorium]

I hope the merged commit will fix this.