add input context menu helper

We are going to want this in more places

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_ui/Cargo.toml

@@ -6,6 +6,9 @@ version.workspace = true
 [dependencies]
 egui = { workspace = true }
 egui_extras = { workspace = true }
+egui-winit = { workspace = true }
+strum_macros = { workspace = true }
+strum = { workspace = true }
 ehttp = { workspace = true }
 nostrdb = { workspace = true }
 tracing = { workspace = true }
@@ -18,4 +21,4 @@ bitflags = { workspace = true }
 enostr = { workspace = true }
 hashbrown = { workspace = true }
 
-blurhash = "0.2.3"
+blurhash = "0.2.3"