Add csharp lsp support (#1788)

* add csharp lsp support

* remove hostPID

* update docs

book/src/generated/lang-support.md

@@ -2,7 +2,7 @@
 | --- | --- | --- | --- | --- |
 | bash | ✓ |  |  | `bash-language-server` |
 | c | ✓ | ✓ | ✓ | `clangd` |
-| c-sharp | ✓ |  |  |  |
+| c-sharp | ✓ |  |  | `OmniSharp` |
 | cmake | ✓ | ✓ | ✓ | `cmake-language-server` |
 | comment | ✓ |  |  |  |
 | cpp | ✓ | ✓ | ✓ | `clangd` |

languages.toml

@@ -206,9 +206,10 @@ name = "c-sharp"
 scope = "source.csharp"
 injection-regex = "c-?sharp"
 file-types = ["cs"]
-roots = []
+roots = ["sln", "csproj"]
 comment-token = "//"
 indent = { tab-width = 4, unit = "\t" }
+language-server = { command = "OmniSharp", args = [ "--languageserver", "--stdio" ] }
 
 [[grammar]]
 name = "c-sharp"