Feature: Option to add diagrams to nested folders

[njm222]

I really like repo-visualizer, thanks for the action!

But it would be really cool if we could create multiple svgs with an array of objects where the properties of the object are the existing inputs

...And a bonus feature would be to allow for regex matching so if you want multiple diagrams in the immediate children directories of a particular directory it is easy to do!
(instead of copying:

uses: githubocto/repo-visualizer@0.7.1
  with:
    output_file: "images/diagram.svg"
    root_path: "/"

for each svg)