Make language adapters able to require certain bundled formatters

crates/zed/src/languages/html.rs

@@ -1,7 +1,7 @@
 use anyhow::{anyhow, Result};
 use async_trait::async_trait;
 use futures::StreamExt;
-use language::{LanguageServerName, LspAdapter, LspAdapterDelegate};
+use language::{BundledFormatter, LanguageServerName, LspAdapter, LspAdapterDelegate};
 use lsp::LanguageServerBinary;
 use node_runtime::NodeRuntime;
 use serde_json::json;
@@ -96,6 +96,10 @@ impl LspAdapter for HtmlLspAdapter {
             "provideFormatter": true
         }))
     }
+
+    fn enabled_formatters(&self) -> Vec<BundledFormatter> {
+        vec![BundledFormatter::prettier()]
+    }
 }
 
 async fn get_cached_server_binary(