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/stormworks/egg-stormworks--build-and-rescue.json

@@ -1,13 +1,20 @@
 {
     "_comment": "DO NOT EDIT: FILE GENERATED AUTOMATICALLY BY PTERODACTYL PANEL - PTERODACTYL.IO",
     "meta": {
-        "version": "PTDL_v1"
+        "version": "PTDL_v1",
+        "update_url": null
     },
-    "exported_at": "2020-10-27T03:09:48+00:00",
+    "exported_at": "2022-01-20T13:01:27-05:00",
     "name": "Stormworks: Build and Rescue",
     "author": "iamkubi@gmail.com",
     "description": "Join a world where you design, create and pilot your own air sea rescue service. Release your inner hero as you battle fierce storms out at sea to rescue those in need.",
-    "image": "quay.io\/parkervcp\/pterodactyl-images:debian_wine-5",
+    "features": [
+        "steam_disk_space"
+    ],
+    "images": [
+        "quay.io\/parkervcp\/pterodactyl-images:debian_wine-5"
+    ],
+    "file_denylist": [],
     "startup": "xvfb-run wine server.exe +server_dir \/home\/container",
     "config": {
         "files": "{}",
@@ -33,4 +40,4 @@
             "rules": "required|string|max:20"
         }
     ]
-}
+}