Allow to configure default prettier

crates/language/src/language_settings.rs

@@ -50,6 +50,7 @@ pub struct LanguageSettings {
     pub remove_trailing_whitespace_on_save: bool,
     pub ensure_final_newline_on_save: bool,
     pub formatter: Formatter,
+    pub prettier: HashMap<String, serde_json::Value>,
     pub enable_language_server: bool,
     pub show_copilot_suggestions: bool,
     pub show_whitespaces: ShowWhitespaceSetting,
@@ -98,6 +99,8 @@ pub struct LanguageSettingsContent {
     #[serde(default)]
     pub formatter: Option<Formatter>,
     #[serde(default)]
+    pub prettier: Option<HashMap<String, serde_json::Value>>,
+    #[serde(default)]
     pub enable_language_server: Option<bool>,
     #[serde(default)]
     pub show_copilot_suggestions: Option<bool>,
@@ -155,9 +158,7 @@ pub enum Formatter {
     #[default]
     Auto,
     LanguageServer,
-    Prettier {
-        config: (), // Support some of the most important settings in the prettier-vscode extension.
-    },
+    Prettier,
     External {
         command: Arc<str>,
         arguments: Arc<[String]>,
@@ -397,6 +398,7 @@ fn merge_settings(settings: &mut LanguageSettings, src: &LanguageSettingsContent
         src.preferred_line_length,
     );
     merge(&mut settings.formatter, src.formatter.clone());
+    merge(&mut settings.prettier, src.prettier.clone());
     merge(&mut settings.format_on_save, src.format_on_save.clone());
     merge(
         &mut settings.remove_trailing_whitespace_on_save,