These are the type definitions for Vendetta plugins running on Revenge.
You can install the package using npm install https://github.com/revenge-mod/vendetta-types.
Given you have configured everything correctly, they should work.
However, if they do not, please add the following to the top of your TypeScript file:
/// <reference path="path/to/node_modules/@revenge-mod/vendetta-types/defs.d.ts" />