Move app and camera to core module

src/core.rs

@@ -0,0 +1,4 @@
+mod app;
+mod camera;
+
+pub use self::{app::App, camera::*};

src/core/app.rs

@@ -5,9 +5,10 @@ use winit::{
     event_loop::{ControlFlow, EventLoop},
 };
 
-use crate::{camera, render};
+use super::camera;
+use crate::render;
 
-pub(crate) struct App {
+pub struct App {
     window: winit::window::Window,
     event_loop: EventLoop<()>,
     render_ctx: render::Context,

src/main.rs

@@ -1,9 +1,7 @@
-mod app;
-mod camera;
 mod core;
 mod render;
 
 fn main() {
     env_logger::init();
-    pollster::block_on(app::App::new(1280, 720, "Epic")).run();
+    pollster::block_on(core::App::new(1280, 720, "Epic")).run();
 }