[Breaking] Split protocol into it's own project

[david-driscoll]

• This makes a new package that is used for both client and server
  • this also decouples the client from the server.
• Changed out all the method names textDocument/x etc to all be static strings.
  • I feel like there are some more ways we can improve this experience for clients and servers by creating a set of base classes and some generic type magic, similar to how the vscode lsp implementation does... however I do not want to tackle that here.

[david-driscoll]

cc @RLittlesII

[codecov]

Codecov Report

Merging #50 into master will increase coverage by 2.11%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #50      +/-   ##
==========================================
+ Coverage   66.79%   68.91%   +2.11%     
==========================================
  Files         196      191       -5     
  Lines        2078     2017      -61     
==========================================
+ Hits         1388     1390       +2     
+ Misses        690      627      -63

Impacted Files	Coverage Δ
...er/Capabilities/DocumentOnTypeFormattingOptions.cs	66.66% <ø> (ø)
src/Protocol/Models/Registration.cs	100% <ø> (ø)
src/Protocol/Models/Location.cs	100% <ø> (ø)
src/Protocol/Models/MessageActionItem.cs	100% <ø> (ø)
src/Protocol/Models/InitializeError.cs	100% <ø> (ø)
src/Protocol/Models/DocumentLinkParams.cs	100% <ø> (ø)
.../Protocol/Models/DocumentOnTypeFormattingParams.cs	100% <ø> (ø)
src/Protocol/Models/MarkedString.cs	100% <ø> (ø)
...c/Protocol/Server/Capabilities/TextDocumentSync.cs	84.61% <ø> (ø)
src/Protocol/Models/TextDocumentItem.cs	100% <ø> (ø)
... and 175 more

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[tintoy]

Looks fine to me; I agree the namespaces were starting to look a little weird 😁

[RLittlesII]

I would generally agree with your reflective magic as static strings are an eye sore, and further agree it is a separate body of work. The refactoring on this looks good.