Settings Override & Reload

[MankowskiNick]

Provide a system for overriding settings in git. Settings.json is currently tracked in source, and I think that it should be. However, there should be a way to override some of these settings locally. This should obviously not be tracked by git.

Ideally, the settings override should not require a whole new settings.local.jsonthat is 1-1 with the already existing settings.json. What I mean by this is that there should be a hierarchy of settings:

1. Local settings should override git settings.
2. Git settings should override default settings.
3. Default settings are directly hardcoded in settings.c.