Add textobjects.scm for zig (#4409)

book/src/generated/lang-support.md

@@ -126,4 +126,4 @@
 | wgsl | ✓ |  |  | `wgsl_analyzer` |
 | xit | ✓ |  |  |  |
 | yaml | ✓ |  | ✓ | `yaml-language-server` |
-| zig | ✓ |  | ✓ | `zls` |
+| zig | ✓ | ✓ | ✓ | `zls` |

runtime/queries/zig/textobjects.scm

@@ -0,0 +1,23 @@
+(TopLevelDecl (FnProto)
+  (_) @function.inside) @function.around
+
+(TestDecl (_) @test.inside) @test.around
+
+; matches all of: struct, enum, union
+; this unfortunately cannot be split up because
+; of the way struct "container" types are defined
+(TopLevelDecl (VarDecl (ErrorUnionExpr (SuffixExpr (ContainerDecl
+    (_) @class.inside))))) @class.around
+
+(TopLevelDecl (VarDecl (ErrorUnionExpr (SuffixExpr (ErrorSetDecl
+    (_) @class.inside))))) @class.around
+
+(ParamDeclList
+  ((_) @parameter.inside . ","? @parameter.around) @parameter.around)
+
+[
+  (doc_comment)
+  (line_comment)
+] @comment.inside
+(line_comment)+ @comment.around
+(doc_comment)+ @comment.around