Merge #8942

8942: Add `library` semantic token modifier to items from other crates r=arzg a=arzg

Closes #5772.

A lot of code here is pretty repetitive; please let me know if you have any ideas how to improve it, or whether it’s fine as-is.

Side-note: How can I add tests for this? I don’t see a way for the test Rust code in `test_highlighting` to reference other crates to observe the new behaviour.


Co-authored-by: Aramis Razzaghipour <aramisnoah@gmail.com>

crates/rust-analyzer/src/to_proto.rs

@@ -504,6 +504,7 @@ fn semantic_token_type_and_modifiers(
             HlMod::Mutable => semantic_tokens::MUTABLE,
             HlMod::Consuming => semantic_tokens::CONSUMING,
             HlMod::Async => semantic_tokens::ASYNC,
+            HlMod::Library => semantic_tokens::LIBRARY,
             HlMod::Unsafe => semantic_tokens::UNSAFE,
             HlMod::Callable => semantic_tokens::CALLABLE,
             HlMod::Static => lsp_types::SemanticTokenModifier::STATIC,