Add a zipped parameter tp create_datapack function, default to true.
If setted to false, the datapack will be in directory form, allowing files-overwriting.

really need supporting .mcfunction file.

delete_datapack(name)
deletes the datapack

create_datapack(name, data, zipped?=true, modality?='create')

modality can be 'create', 'overwrite' or 'merge'
If zipped is true, I think it is not possible to change modality (fixed on 'create')

it should possible to add the ability to overwrite disabled zipped datapacks too 🤔

suggesting adding another parameter optinally indicating allowing for overwrite (still only applicable to folder dpacks. Reason is explicitness - you don't want to make changes by accident and its fair to assume that by default dpacks are write-once-read-only
so
create_datapack(name, data, zipped=true?, overwrite=false?)