Allow specifying custom repository root

[denolehov]

Expose a setting for specifying a custom repository root in order to cover use-case where git repo is not in the root of the vault, but in one of the subfolders that users wish to backup.

[dummifiedme]

Related to this

My use case is my github repo is say Folder A, and I want a subfolder B to be my Vault. Will it work if I work on folder B from Obsidian? or the I have to compulsarily make Folder A as my Vault.

[denolehov]

As of right now, you'd have to make Folder A as your vault. Plugin looks for git repo in the root of the vault.