Move Canvas and QRCode to iced crate

Rename `canvas` modules to `geometry` in graphics subcrates

renderer/src/lib.rs

@@ -1,6 +1,8 @@
-pub mod widget;
 pub mod window;
 
+#[cfg(feature = "geometry")]
+pub mod geometry;
+
 mod backend;
 mod settings;
 
@@ -19,12 +21,3 @@ pub use iced_graphics::{
 /// [`iced`]: https://github.com/iced-rs/iced
 pub type Renderer<Theme = iced_native::Theme> =
     iced_graphics::Renderer<Backend, Theme>;
-
-#[derive(Debug, Clone)]
-pub struct Geometry(pub(crate) Primitive);
-
-impl From<Geometry> for Primitive {
-    fn from(geometry: Geometry) -> Self {
-        geometry.0
-    }
-}