File-Sorting looks for newly created files in a specified directory and automatically sorts them
after their year and month of creation.
Example:
You put a file created on the 31st December 2020 in a directory. The programm now automatically creates
creates the subdirectory "2020" and inside the subdirectory a new directory named "12". Then it moves the file to
./2020/12/
Note: Make sure to only add/create one file after another, otherwise the program might not correctly