c/c++ highlights: *& are @type or @operator based on context (#4278)

runtime/queries/c/highlights.scm

@@ -51,6 +51,9 @@
   (preproc_directive)
 ] @keyword.directive
 
+(pointer_declarator "*" @type.builtin)
+(abstract_pointer_declarator "*" @type.builtin)
+
 [
   "+"
   "-"

runtime/queries/cpp/highlights.scm

@@ -34,6 +34,10 @@
 (auto) @type
 "decltype" @type
 
+(ref_qualifier ["&" "&&"] @type.builtin)
+(reference_declarator ["&" "&&"] @type.builtin)
+(abstract_reference_declarator ["&" "&&"] @type.builtin)
+
 ; Constants
 
 (this) @variable.builtin