feat: add steam_disk_space egg feature to SteamCMD eggs

A new egg feature modal was introduced in Panel v1.7.0 triggering when server has run out of disk space to provide more user-friendly instructions to both admins and normal users. This is unique to SteamCMD specific errors.

game_eggs/steamcmd_servers/ark_survival_evolved/egg-ark--survival-evolved.json

@@ -8,7 +8,9 @@
     "name": "Ark: Survival Evolved",
     "author": "dev@shepper.fr",
     "description": "As a man or woman stranded, naked, freezing, and starving on the unforgiving shores of a mysterious island called ARK, use your skill and cunning to kill or tame and ride the plethora of leviathan dinosaurs and other primeval creatures roaming the land. Hunt, harvest resources, craft items, grow crops, research technologies, and build shelters to withstand the elements and store valuables, all while teaming up with (or preying upon) hundreds of other players to survive, dominate... and escape! \u2014 Gamepedia: ARK",
-    "features": null,
+    "features": [
+        "steam_disk_space"
+    ],
     "images": [
         "ghcr.io\/parkervcp\/games:source"
     ],
@@ -119,4 +121,4 @@
             "rules": "nullable|string"
         }
     ]
-}
+}