Add keyboard shortcut for "Locate"

[JamesT]

@tobias

The reason we chose this key combo is to match VS Code (the editor we use to code Supernotes) which has a similar function.

I understand why that was your first instinct, but I wonder if that’s the right choice for Supernotes moving forward?

VS Code uses CMD + SHIFT + E because that panel is called the “Explorer”, so E makes sense. In Supernotes, that panel is called the “Overview”, and that section is called “Outline”, so perhaps the shortcut should be changed to CMD + SHIFT + O? (If you prefer to follow the VS Code idea of the shortcut being named after the destination, rather than the action - i.e. “Locate”).