Load from vimrc

[sho-87]

I posted this featured request over in the main spyder repo but was suggested to post it here instead:

It would be extremely useful to be able to load keybindings from an existing .vimrc file as well. Maybe even just a simple parsing of the vimrc to extract common binds (which I believe is what ideavim does for the intellij platforms: https://github.com/JetBrains/ideavim)