[FEATURE] Allow modifying script bytecodes

[Panquesito7]

Is your feature request related to a problem? Please describe.

Currently, it's not possible to modify the script bytecodes.
Given that the program can read from bytecode to JSON, I'm sure it's possible to do the opposite.

Describe the solution you'd like

Allow modifying script bytecodes and saving them.

Describe alternatives you've considered

None.

Additional context

This shouldn't be too hard to implement, as (from my understanding) the API can already read/write script bytecodes: https://atenfyr.github.io/UAssetAPI/api/uassetapi.kismet.kismetserializer.html

[atenfyr]

As of commit 03b27ed, it is technically possible to modify Kismet bytecode in UAssetGUI by disabling the "Enable pretty bytecode" option. However, I'm leaving this issue open, because I don't consider this to really qualify as support for modifying bytecode. Some intermediate format for modification needs to be developed for the feature to be usable.