About some enchantment functions

[HaiXi2912]

in purpur.yml
Anvil allow-higher-enhants-levels

Allow players to combine two enchantment books of the same level into one. I can add one item to my task:
Allow-higher-enhancents allows players to apply more advanced enchantment books,
This option does not allow allow-higher-ennchants-levels
It means that players are allowed to use Sharp X directly, but two Sharp X enchantment books cannot be merged into XI
I hope to add this function
In addition, in the allow-infinity-and-mending-together
Although the arrow is infinite, the crossbow can make any arrow infinite, liquid medicine arrow, fireworks, etc
However, in infinity-bow, you can set unlimited arrow types. I hope you can optimize them