Allow regular expressions in the InAppIncludes and InAppExcludes

[jamescrosswell]

Problem Statement

One of our customers wants to be able to simply add their own namespace as an include and exclude everything else (see Discord thread).

Currently this doesn't work as the logic to determine whether a frame is InApp or not is: https://github.com/getsentry/sentry-dotnet/blob/5fab09efd4204fd07d95c818df79f7aa71d61e88/src/Sentry/SentryStackFrame.cs#L218

So if you don't have any excludes configured (or the namespace doesn't match some prefix configured as an exclude) the frame is determined as InApp.

Solution Brainstorm

If SentryOptions.InAppInclude and SentryOptions.InAppExclude were lists of SubstringOrRegex rather than just lists of prefixes, it would be possible to configure an Exclude of .*... which would enable the customer to do what they want.