Add diagrams showing management of vaults in workspaces via Draw.io diagrams

[Here](https://github.com/SeaDude/drawio/blob/main/dendron.diagrams.drawio) are the .drawio diagrams referenced [here](https://discordapp.com/channels/717965437182410783/783027389919658025/938494463922274304).
Take care!