clipping planes for camera

samples/bin/library/scripts/emmy/components/camera.lua

@@ -9,12 +9,15 @@ local camera = {
     ---@type integer
     depth = 0,
 
+    ---@type number
+    znear = 0.0,
+
+    ---@type number
+    zfar = 1000.0,
+
     ---@type rect
     viewport = rect.zero(),
 
-    ---@type m4f
-    projection = m4f.identity(),
-
     ---@type color
     background = color.white()
 }