First set of changes to use config file instead of hard-coded settings.

src/renderer/structs.rs

@@ -1,5 +1,6 @@
 use sdl3::{Sdl, pixels::Color, render::Canvas, ttf::Font, video::Window};
-
+extern crate serde;
+extern crate serde_derive;
 
 pub struct Screen<'a> {
     pub(crate) canvas: Box<Canvas<Window>>,
@@ -8,9 +9,16 @@ pub struct Screen<'a> {
     pub(crate) context: Box<Sdl>
 }
 
+#[derive(Debug, PartialEq, Serialize, Deserialize)]
 pub struct Prefs {
+
+    #[serde(rename = "font-path")]
     pub font_path: String,
+
+    #[serde(rename = "width")]
     pub screen_width: u32,
+
+    #[serde(rename = "height")]
     pub screen_height: u32,
 }