Import art/VFX asset packs + game-feel systems; normalize texture extensions to lowercase for LFS

Add BefourStudios SciFi environment packs, Gabriel Aguiar VFX, and the
ShaderCrew Toon Shader embedded packages, plus combat/enemy/wave/death
gameplay systems and supporting vault docs/screenshots.

Rename 11 vendor textures from uppercase .PNG/.HDR to lowercase so the
case-sensitive Git LFS filters (*.png/*.hdr) match on case-sensitive
filesystems (Linux CI, case-sensitive macOS), not just locally where
core.ignorecase=true masks the gap. Each .meta moved with its asset so
GUID references are preserved. All ~1000 binaries tracked via LFS.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Assets/_Project/Scripts/Authoring/Player/PlayerAuthoring.cs

@@ -28,6 +28,14 @@ namespace ProjectM.Authoring
         /// <summary>Projectile hit-test radius for the player as a damageable target, in world units.</summary>
         [Min(0f)] public float HitRadius = 0.6f;
 
+        [Min(1)]
+        [Tooltip("Ticks the player stays down before respawning at base (~60 ticks/sec).")]
+        public int RespawnDelayTicks = 180;
+
+        [Min(0)]
+        [Tooltip("Ticks of post-respawn damage immunity (~60 ticks/sec).")]
+        public int RespawnInvulnTicks = 120;
+
         private class PlayerBaker : Baker<PlayerAuthoring>
         {
             public override void Bake(PlayerAuthoring authoring)
@@ -66,6 +74,13 @@ namespace ProjectM.Authoring
                 AddComponent(entity, new HitRadius { Value = authoring.HitRadius });
                 AddComponent<AbilityCooldown>(entity);
                 AddBuffer<DamageEvent>(entity);
+
+                // Death gate (enableable, derived from Health by PlayerDeathStateSystem) baked DISABLED = alive;
+                // plus the server-only respawn timer.
+                AddComponent<Dead>(entity);
+                SetComponentEnabled<Dead>(entity, false);
+                AddComponent(entity, new RespawnState { RespawnTick = 0, DelayTicks = authoring.RespawnDelayTicks, InvulnTicks = authoring.RespawnInvulnTicks });
+                AddComponent(entity, new RespawnInvuln { UntilTick = 0 });
             }
         }
     }