Extra SLP directories with substring of root directory can't be added

[NikhilNarayana]

Attempting to add an adjacent directory that contains the root directory path a substring will result in Cannot add sub directories of the Root SLP Directory. error. Users should be able to add these directories since there isn't a real conflict.

Example: Root = C:\Users\Nikki\Documents\Slippi Adding C:\Users\Nikki\Documents\Slippi Test will result in the error mentioned above.

[dryu99]

Hey I can take this on! I've already whipped up a local branch, just need collaborator permissions for the repo to push to a remote branch and then I'll make a PR 👍

Ignore that last bit, I just joined the Discord and saw that forks are preferred vs branches 👌