feat: automatically loading models used in skeleton

res/content/base/models/player.mtl

@@ -1,13 +0,0 @@
-# Blender MTL File: 'player.blend'
-# Material Count: 1
-
-newmtl entities/player
-Ns 96.078431
-Ka 1.000000 1.000000 1.000000
-Kd 0.640000 0.640000 0.640000
-Ks 0.000000 0.000000 0.000000
-Ke 0.000000 0.000000 0.000000
-Ni 1.000000
-d 1.000000
-illum 1
-map_Kd /home/ubuntu/Projects/Cpp/VoxelEngine-Cpp/res/content/base/textures/entities/player.png

res/content/base/preload.json

@@ -5,10 +5,6 @@
         "events/pickup"
     ],
     "models": [
-        "block",
-        "drop-block",
-        "drop-item",
-        "player",
-        "player-head"
+        "drop-item"
     ]
 }