feat: Scope using namespace names (C#)

src/scoping/langs/csharp.rs

@@ -19,6 +19,8 @@ pub enum PremadeCSharpQuery {
     /// Raw strings are not yet supported
     /// (https://github.com/tree-sitter/tree-sitter-c-sharp/pull/240 not released yet).
     Strings,
+    /// `using` directives (including periods).
+    Usings,
 }
 
 impl From<PremadeCSharpQuery> for TSQuery {
@@ -27,6 +29,9 @@ impl From<PremadeCSharpQuery> for TSQuery {
             CSharp::lang(),
             match value {
                 PremadeCSharpQuery::Comments => "(comment) @comment",
+                PremadeCSharpQuery::Usings => {
+                    r"(using_directive [(identifier) (qualified_name)] @import)"
+                }
                 PremadeCSharpQuery::Strings => {
                     r#"
                     [

tests/langs/csharp/in/usings.cs

@@ -0,0 +1,5 @@
+using Sys__T__tem;
+using System__T__.IO;
+using Project = __T__PC.MyCompany.Project;
+using static System.__T__Math;
+using Project = MyCompany.ProjectNames__T__pace.ProjectClass;

tests/langs/csharp/mod.rs

@@ -6,6 +6,7 @@ use super::{get_input_output, nuke_target};
 #[rstest]
 #[case("comments.cs", CSharpQuery::Premade(PremadeCSharpQuery::Comments))]
 #[case("strings.cs", CSharpQuery::Premade(PremadeCSharpQuery::Strings))]
+#[case("usings.cs", CSharpQuery::Premade(PremadeCSharpQuery::Usings))]
 fn test_csharp_nuke(#[case] file: &str, #[case] query: CSharpQuery) {
     let lang = CSharp::new(query);
 

tests/langs/csharp/out/usings.cs

@@ -0,0 +1,5 @@
+using System;
+using System.IO;
+using Project = PC.MyCompany.Project;
+using static System.Math;
+using Project = MyCompany.ProjectNamespace.ProjectClass;