Added new FileOperations and updated to work with latest annotations

[david-driscoll]

No description provided.

[codecov]

Codecov Report

Merging #470 (a8ed776) into master (87a2f3a) will increase coverage by 6.11%.
The diff coverage is 75.00%.

@@            Coverage Diff             @@
##           master     #470      +/-   ##
==========================================
+ Coverage   66.51%   72.63%   +6.11%     
==========================================
  Files         254      254              
  Lines       12183    12245      +62     
  Branches      832      832              
==========================================
+ Hits         8104     8894     +790     
+ Misses       4079     3351     -728     

Impacted Files	Coverage Δ
...erators/AssemblyCapabilityKeyAttributeGenerator.cs	3.79% <0.00%> (-0.32%)	⬇️
...ators/AssemblyJsonRpcHandlersAttributeGenerator.cs	5.88% <7.69%> (+0.75%)	⬆️
...red/LanguageProtocolServiceCollectionExtensions.cs	76.00% <52.38%> (-18.74%)	⬇️
src/Client/LanguageClientRegistrationManager.cs	62.38% <80.00%> (+15.26%)	⬆️
src/JsonRpc/OutputHandler.cs	96.72% <90.00%> (-1.56%)	⬇️
...enerators/Contexts/RegistrationOptionAttributes.cs	100.00% <100.00%> (ø)
...nRpc.Generators/GenerateHandlerMethodsGenerator.cs	97.20% <100.00%> (+0.09%)	⬆️
...JsonRpc.Generators/RegistrationOptionsGenerator.cs	94.71% <100.00%> (-0.06%)	⬇️
src/JsonRpc/JsonRpcServerOptionsBase.cs	78.48% <100.00%> (+15.18%)	⬆️
src/Server/LanguageServer.cs	95.92% <100.00%> (+18.10%)	⬆️
... and 76 more

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