feature/analysing using custom repertoire

[ChrompyCoder]

Much needed feature according to me.
Feature: allows you to upload multiple .pgn files from your repertoire which will allow you to see/analyse where you have deviated from the game

Current constraint: doesnt allow multiple games in single .pgn

[veloce]

A screen recording of your feature request would be much appreciated. I need to see what it does. Thank you!

[ChrompyCoder]

i found a bug in my code, the feature doesnt work properly when user creates a tree in analysis board

i will fix ans test everything and push it in a week along with the video demo