Add the FrameContextifierIntegration integration

[ste93cry]

Q	A
Branch?	2.4
Bug fix?	no
New feature?	yes
BC breaks?	no
Deprecations?	yes
License	MIT

Porting of the contextifyFramesIntegration integration of the Go SDK. The main benefit of this change is that we're moving away from the Stacktrace class a lot of code that doesn't belongs there, advancing one more step towards making it a value object and DTO rather than a service that depends on the serializer, the client options, etc.

[Jean85]

My main concern is dropping the option: that is a really easy way to set that behavior, removing that would mean forcing the user to fill in a lot of blanks just to set an int...

Apart from that, I do have only some minor fixes to request.