[C#] Tuples and Records support (#808)

* implement flags for c# as enums

* remove dead code, fix lowering for >32 bit flags

* add documentation for testing single wit fiel

* wip

* align namespaces for exports

Add records runtime test
tidy up a bit of the import return area

* remove vscode files

* remove vim files

* remove vs sln

* Changed to positional arguments

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Co-authored-by: Timmy Silesmo <[email protected]>

Author: yowl