Remove 2 suffix for ui, storybook, text

Co-authored-by: Mikayla <mikayla@zed.dev>

crates/ui/src/selectable.rs

@@ -0,0 +1,22 @@
+/// A trait for elements that can be selected.
+pub trait Selectable {
+    /// Sets whether the element is selected.
+    fn selected(self, selected: bool) -> Self;
+}
+
+#[derive(Debug, Default, PartialEq, Eq, Hash, Clone, Copy)]
+pub enum Selection {
+    #[default]
+    Unselected,
+    Indeterminate,
+    Selected,
+}
+
+impl Selection {
+    pub fn inverse(&self) -> Self {
+        match self {
+            Self::Unselected | Self::Indeterminate => Self::Selected,
+            Self::Selected => Self::Unselected,
+        }
+    }
+}