init tiles, table/camera/environment placeholder

src/main.rs

@@ -1,3 +1,15 @@
+use bevy::prelude::*;
+
+use crate::gui::{tiles::*, *};
+
+mod gui;
+mod tui;
+
 fn main() {
-    println!("Hello, world!");
+    App::new()
+        // .add_plugins(DefaultPlugins)
+        .add_systems(Startup, init_table)
+        .add_systems(Startup, init_tileset)
+        .add_systems(Startup, init_environment)
+        .run();
 }