Globalize is a small, dependency free* mod that allows modpack creators to add global datapacks to their modpacks.
All you need to do is put your datapack in the datapacks folder in your modpacks root directory and Globalize will automatically load it for you.
*Technically, Globalize does use the fabric-api-base module, as it is required to load a mod at all. You still won't need to install it though, at it is built into the JAR.