Fix #66: Pipes not rendering correctly after quitting and coming back to game

Author: Technici4n

src/main/java/dev/technici4n/moderndynamics/pipe/PipeBlockEntity.java

@@ -137,7 +137,9 @@ public void fromClientTag(CompoundTag tag) {
             host.readClientNbt(tag);
         }
 
-        if (tag.getBoolean("#c")) { // remesh flag, a bit hacky but it should work ;)
+        // remesh flag, a bit hacky but it should work ;)
+        // the second check ensures that the very first packet is processed even though it doesn't have the remesh flag
+        if (tag.getBoolean("#c") || clientModelData == null) {
             var attachmentTags = tag.getList("attachments", Tag.TAG_COMPOUND);
             var attachments = new AttachmentModelData[6];
             for (var direction : Direction.values()) {