feat: added clap for level parsing

- Camera sets up as a child of player entity

src/lib.rs

@@ -7,6 +7,7 @@ use bevy_rapier2d::{
     prelude::*,
     rapier::prelude::IntegrationParameters,
 };
+use clap::Parser;
 
 pub mod input;
 pub mod inventory;
@@ -37,7 +38,15 @@ pub enum LoadingState {
     Ready,
 }
 
-fn camera_bundle() -> impl Bundle {
+#[derive(Parser, Resource, Clone, PartialEq, Eq, Hash, Debug, Reflect, Default)]
+#[reflect(Resource, Clone, PartialEq, Hash, Debug, Default)]
+pub struct StartupArgs {
+    #[arg(long, short, default_value = "levels/level.toml")]
+    /// Level to load (relative to assets folder)
+    level: String,
+}
+
+pub fn camera_bundle() -> impl Bundle {
     (
         Camera2d,
         Camera {
@@ -67,7 +76,6 @@ pub const fn meters(value: f32) -> f32 {
 }
 
 fn setup_global(mut commands: Commands) {
-    commands.spawn(camera_bundle());
     commands.spawn(ui::UiRoot::new());
 }