Hi there!
This is a plugin created specifically for RPG Maker Engines. In that case, RPG Maker MV and MZ.
Unfortunately, both RPG Makers are not free. Although MV is cheaper(and older) than MZ.
MV - https://store.steampowered.com/app/363890/RPG_Maker_MV/
MZ - https://store.steampowered.com/app/1096900/RPG_Maker_MZ/