Most of getting completion documentation resolved & cached MD parsing

crates/project/src/lsp_command.rs

@@ -1462,6 +1462,7 @@ impl LspCommand for GetCompletions {
                                     lsp_completion.filter_text.as_deref(),
                                 )
                             }),
+                            alongside_documentation: None,
                             server_id,
                             lsp_completion,
                         }