Add tile graphic

src/res.rs

@@ -0,0 +1,13 @@
+use sfml::{graphics::Texture, SfBox};
+
+pub struct Res {
+    pub tile_atlas: SfBox<Texture>,
+}
+
+impl Res {
+    pub fn load() -> anyhow::Result<Self> {
+        Ok(Self {
+            tile_atlas: Texture::from_file("res/tiles.png")?,
+        })
+    }
+}