Прописать PATH для поиска команды или указать полный путь до программы/команды cookiecutter.
https://cookiecutter.readthedocs.io/en/latest/inst...Ensure the directory where cookiecutter will be installed is in your environment’s Path in order to make it possible to invoke it from a command prompt. To do so, search for “Environment Variables” on your computer (on Windows 10, it is under System Properties –> Advanced) and add that directory to the Path environment variable, using the GUI to edit path segments.
Example segments should look like %APPDATA%\Python\Python3x\Scripts, where you have your version of Python instead of Python3x.
You may need to restart your command prompt session to load the environment variables.