refactor(CraftingManager): change packet fields to private and optimize packet caching

[lt-name]

No description provided.

[Mcayear]

The rebuildPacket function no longer builds packets for all versions, but only for the latest version (ProtocolInfo.CURRENT_PROTOCOL).

Positive:

This will optimize initial startup speed and memory usage.

Negative:

I hypothesize that a player not using ProtocolInfo.CURRENT_PROTOCOL might experience lag-induced disconnections upon their first login due to this change.

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Overall, this is a viable performance optimization.

[Mcayear]

Start Speed：

Test Group	Raw Data (seconds)	Data after Removing Outliers (seconds)	Average (seconds)
1	8.474, 8.378, 8.697, 9.465, 8.867, 9.417, 8.773, 8.63	8.474, 8.697, 8.867, 9.417, 8.773, 8.63	8.810
2	9.702, 9.683, 9.996, 9.254, 7.884	9.702, 9.683, 9.254	9.546

I have used "Data after Removing Outliers" which is a common and clear way to describe the data after the highest and lowest values have been removed.

RAM Usage：

Test Group	Memory Data (MB)	Average Memory Usage (MB)
1	308.58, 306.15	307.365
2	361.45, 378.81	370.13

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Overall, the speed optimization is not significant, while the memory savings are approximately 60 MB.

[Mcayear]

the null assignments, like packet313 = null, serve no purpose here.

https://github.com/MemoriesOfTime/Nukkit-MOT/pull/407/files#diff-4880b821743163bc060ccdcb2c07f185d0b117625ac2f427d7b09a43b0c57b5fR739