Start on context_menu crate

crates/context_menu/src/context_menu.rs

@@ -0,0 +1,28 @@
+use gpui::{Entity, View};
+
+enum ContextMenuItem {
+    Item {
+        label: String,
+        action: Box<dyn Action>,
+    },
+    Separator,
+}
+
+pub struct ContextMenu {
+    position: Vector2F,
+    items: Vec<ContextMenuItem>,
+}
+
+impl Entity for ContextMenu {
+    type Event = ();
+}
+
+impl View for ContextMenu {
+    fn ui_name() -> &'static str {
+        "ContextMenu"
+    }
+
+    fn render(&mut self, cx: &mut gpui::RenderContext<'_, Self>) -> gpui::ElementBox {
+        Overlay::new().with_abs_position(self.position).boxed()
+    }
+}