Add "go to type definition" action

crates/rpc/src/proto.rs

@@ -106,6 +106,8 @@ messages!(
     (GetCompletionsResponse, Background),
     (GetDefinition, Background),
     (GetDefinitionResponse, Background),
+    (GetTypeDefinition, Background),
+    (GetTypeDefinitionResponse, Background),
     (GetDocumentHighlights, Background),
     (GetDocumentHighlightsResponse, Background),
     (GetReferences, Background),
@@ -183,6 +185,7 @@ request_messages!(
     (GetHover, GetHoverResponse),
     (GetCompletions, GetCompletionsResponse),
     (GetDefinition, GetDefinitionResponse),
+    (GetTypeDefinition, GetTypeDefinitionResponse),
     (GetDocumentHighlights, GetDocumentHighlightsResponse),
     (GetReferences, GetReferencesResponse),
     (GetProjectSymbols, GetProjectSymbolsResponse),
@@ -226,6 +229,7 @@ entity_messages!(
     GetCodeActions,
     GetCompletions,
     GetDefinition,
+    GetTypeDefinition,
     GetDocumentHighlights,
     GetHover,
     GetReferences,

crates/rpc/src/rpc.rs

@@ -6,4 +6,4 @@ pub use conn::Connection;
 pub use peer::*;
 mod macros;
 
-pub const PROTOCOL_VERSION: u32 = 28;
+pub const PROTOCOL_VERSION: u32 = 29;