Add HighlightModifier::Callable and add it for locals

crates/rust-analyzer/src/semantic_tokens.rs

@@ -77,6 +77,7 @@ define_semantic_token_modifiers![
     (CONSUMING, "consuming"),
     (UNSAFE, "unsafe"),
     (ATTRIBUTE_MODIFIER, "attribute"),
+    (CALLABLE, "callable"),
 ];
 
 #[derive(Default)]

crates/rust-analyzer/src/to_proto.rs

@@ -408,6 +408,7 @@ fn semantic_token_type_and_modifiers(
             HighlightModifier::Mutable => semantic_tokens::MUTABLE,
             HighlightModifier::Consuming => semantic_tokens::CONSUMING,
             HighlightModifier::Unsafe => semantic_tokens::UNSAFE,
+            HighlightModifier::Callable => semantic_tokens::CALLABLE,
         };
         mods |= modifier;
     }