Name collisions with supporting types

[arg0d]

There are a bunch of supporting/internal types that can cause name collisions with consumer's namespace. These aren't very generic and not used very often unlike some other types, i.e. File, Stream, etc.., but thinking long term this could for sure create problems for someone. I wonder maybe its possible to neatly wrap all these supporting types into their own namespace.

AllocationException
BigEndianStream
CallStatusErrorHandler
ConcurrentHandleMap
FfiConverter*
FFIObject
FFIObjectUtil
FFISafeHandle
ForeignBytes
ForeignCallback
InternalException
InvalidEnumException
NullCallStatusErrorHandler
PanicException
RustBuffer
RustCallStatus
StreamUnderflowException
UndeclaredErrorException
UniffiException

[meenzen]

In C# 11 it is possible to scope types to a specific file: https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/file