What mod does your feature request relate to? Please briefly describe it.
Mod name: Cloud Storage
Curseforge download(The higher it is, the higher the priority): https://www.curseforge.com/minecraft/mc-mods/alexs-cloud-storage

I read this repo's wiki page and issues that this mod isn't on the list of already compatible mod.

• Yes

Describe the compatibility you'd like
Add balloon sellers to CTOV villages

For a village building mod, how many villager professions are added by the mod?
Just one, the balloon seller.

Released in CTOV 3.4.5 without the balloons in the balloon stalls