add tooltip

crates/core/src/lib.rs

@@ -45,6 +45,9 @@ pub mod popover;
 #[cfg(feature = "scroll_area")]
 pub mod scroll_area;
 
+#[cfg(feature = "tooltip")]
+pub mod tooltip;
+
 /// Initializes everything the components need at startup.
 pub fn init(cx: &mut App) {
     gpui_native_theme::Theme::init(cx);