Add using use case

Author: menduz

tests/baselines/using.baseline.txt

@@ -0,0 +1,44 @@
+original file
+-----------------------------------
+fun printPassCapable(item) =
+  using(msg = aa)
+    item
+-----------------------------------
+
+Grammar: DataWeave.tmLanguage
+-----------------------------------
+>fun printPassCapable(item) =
+ ^^^
+ meta.directive.fun.dw storage.type.dw
+    ^
+    meta.directive.fun.dw
+     ^^^^^^^^^^^^^^^^
+     meta.directive.fun.dw entity.name.function.dw
+                     ^
+                     meta.directive.fun.dw
+                      ^^^^
+                      meta.directive.fun.dw variable.parameter.dw
+                          ^
+                          meta.directive.fun.dw
+                           ^
+                           meta.directive.fun.dw
+                            ^
+                            meta.directive.fun.dw keyword.operator.assignment.dw
+>  using(msg = aa)
+   ^^^^^
+   using-statement.expr.dw keyword.control.using.dw
+        ^
+        using-statement.expr.dw
+         ^^^
+         using-statement.expr.dw entity.name.variable.dw
+            ^^
+            using-statement.expr.dw keyword.operator.dw
+              ^
+              using-statement.expr.dw
+               ^^
+               using-statement.expr.dw variable.other.dw
+                 ^
+                 using-statement.expr.dw
+>    item
+     ^^^^
+     variable.other.dw

tests/cases/using.dwl

@@ -0,0 +1,3 @@
+fun printPassCapable(item) =
+  using(msg = aa)
+    item