Movie Collection Subfolder Support // mod: create collections based on folder structure

Upon further reflection, I think this is actually the most flexible, granular, easy, and clean approach.

To elaborate slightly, you could (optionally) place a e.g. plex.txt file within a folder you wished to apply tags/collections to.

This plex.txt could be structured something like:

# Plex metadata file

# Add each tag you wish to apply on a seperate line.
# To apply the tag to items in subfolders as well, append with "-subfolders"
Tags:
IronMan
Antman
Phase2-subfolders

# Add each tag you wish to apply on a seperate line. 
# To apply the collection to items in subfolders as well, append with "-subfolders"
Collections: 
MCU-subfolders
Avengers