feat: map selection and game loading state (#18)

* wip: map selection and game loading state

* fix: navmesh generation not triggered, wrong states

* fix: regenerate navmesh if already exists

* fix: game flow app state

* feat: show a preview of the selected map as image

* feat: selected map text color

Author: invertedEcho

assets/maps/medium/license.txt renamed to assets/maps/medium_plastic/license.txt

@@ -1,7 +1,9 @@
 use bevy::prelude::*;
 
 #[derive(Component)]
-pub struct EnemyBullet;
+pub struct EnemyBullet {
+    pub origin_enemy: Entity,
+}
 
 /// A timer so that enemies don't just shoot every frame but every x seconds
 #[derive(Component)]

assets/maps/medium_plastic/preview.png

@@ -54,10 +54,19 @@ pub fn detect_player_bullet_collision_with_enemy(
 
 pub fn enemy_shoot_player(
     mut commands: Commands,
-    enemy_query: Query<(&Enemy, &Transform, &EnemyShootPlayerCooldownTimer)>,
+    enemy_query: Query<(
+        Entity,
+        &Enemy,
+        &Transform,
+        &EnemyShootPlayerCooldownTimer,
+    )>,
 ) {
-    for (enemy, enemy_transform, enemy_shoot_player_cooldown_timer) in
-        enemy_query
+    for (
+        enemy_entity,
+        enemy,
+        enemy_transform,
+        enemy_shoot_player_cooldown_timer,
+    ) in enemy_query
     {
         if enemy.state != EnemyState::AttackPlayer
             || !enemy_shoot_player_cooldown_timer.0.just_finished()
@@ -87,7 +96,9 @@ pub fn enemy_shoot_player(
             LinearVelocity(world_bullet_velocity),
             RigidBody::Kinematic,
             DespawnTimer(Timer::from_seconds(3.0, TimerMode::Once)),
-            EnemyBullet,
+            EnemyBullet {
+                origin_enemy: enemy_entity,
+            },
             CollidingEntities::default(),
         ));
     }

assets/maps/medium/scene.bin renamed to assets/maps/medium_plastic/scene.bin

@@ -8,7 +8,7 @@ use crate::{
     },
     nav_mesh_pathfinding::{ArchipelagoRef, ENEMY_AGENT_RADIUS},
 };
-use avian3d::math::PI;
+use avian3d::{math::PI, prelude::LinearVelocity};
 use bevy::prelude::*;
 use bevy_landmass::{
     Agent, Agent3dBundle, AgentSettings, AgentTarget3d, ArchipelagoRef3d,
@@ -138,6 +138,7 @@ fn handle_spawn_enemies_at_enemy_spawn_locations_message(
                                 TimerMode::Repeating,
                             )),
                             Visibility::Visible,
+                            LinearVelocity::ZERO,
                         ))
                         .with_child((
                             Transform {