add button

crates/core/src/common.rs

@@ -0,0 +1,13 @@
+//! Shared element constructors and small style helpers.
+
+use gpui::{Div, Styled as _, div};
+
+/// A row whose children center on the cross axis.
+pub fn h_flex() -> Div {
+    div().flex().flex_row().items_center()
+}
+
+/// A column whose children stretch across the cross axis.
+pub fn v_flex() -> Div {
+    div().flex().flex_col()
+}