refactor: split up and move texture-related code into src/texture submodule

src/texture/mod.rs

@@ -0,0 +1,11 @@
+use sdl2::{render::Canvas, video::Window};
+
+use crate::direction::Direction;
+
+/// Trait for drawable atlas-based textures
+pub trait FrameDrawn {
+    fn render(&self, canvas: &mut Canvas<Window>, position: (i32, i32), direction: Direction, frame: Option<u32>);
+}
+
+pub mod animated;
+pub mod atlas;