null checks and portal tags

common/src/main/java/net/lerariemann/infinity/block/entity/InfinityPortalBlockEntity.java

···
         }
         else if (tag.getType("Dimension") == NbtElement.STRING_TYPE) { //new better format
             this.dimension = Identifier.of(NbtUtils.getString(tag, "Dimension"));
-            this.portalColor = NbtUtils.getInt(tag, "Color", (world != null ? PortalColorApplier.of(dimension, world.getServer()) :
-                    PortalColorApplier.of(dimension, new NbtCompound())).apply(pos) & 0xFFFFFF);
+            if (world != null && world.getServer() != null)
+                this.portalColor = NbtUtils.getInt(tag, "Color", PortalColorApplier.of(dimension, world.getServer()).apply(pos) & 0xFFFFFF);
+            else
+                this.portalColor = NbtUtils.getInt(tag, "Color", PortalColorApplier.of(dimension, new NbtCompound()).apply(pos) & 0xFFFFFF);
         }
         else {
             setDimension(InfinityMethods.getRandomSeed(new Random())); //random by default

common/src/main/resources/data/minecraft/tags/block/portals.json

···
+{
+  "replace": false,
+  "values": [
+    "infinity:neither_portal"
+  ]
+}

gradle.properties

···
 maven_group = net.lerariemann
 archives_name = infinity
 enabled_platforms = fabric,neoforge
-tbversion = 4
+tbversion = 7
 
 # Minecraft properties
 minecraft_version = 1.21.1