Pass formatting options in snippets

[dibarbet]

Summary of the changes

• Uses document options from client and passes them to C# to retrieve the razor formatted snippet text.

Tested

[NTaylorMullen]

Easy peezy! @ryanbrandenburg do you have a tracker for integration tests we need to add? We should definitely include snippet expansions as one

[ryanbrandenburg]

List of desired integration tests lives here: #5952. I can add Snippet expansion and let @dibarbet flesh it out.

[NTaylorMullen]