Feature request: convert between various tuple deconstruction syntaxes

[IanKemp]

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https://docs.microsoft.com/en-us/dotnet/csharp/deconstruct#deconstructing-a-tuple

It would be extremely useful if we could convert e.g. the following:

(var foo, var bar) = MethodThatReturnsATwoTuple();

to e.g.:

var (foo, bar) = MethodThatReturnsATwoTuple();