Regex search for processor

[bgribble]

This will be very helpful in making connections.

/ pri RET finds the nearest [print], for example

Matches should be interactively highlighted

n and p should navigate to the next and previous match

[bgribble]

Better solution, maybe? / starts a new minor mode. Every object on the screen gets a badge with a single character in a-zA-Z0-9. Type that character to select the object.

Objects should keep the same "code" once they have one.

Starting with objects closest to the pointer (or current selection?) and getting farther, we should prefer a letter in the init-type of the object but move to later letters. So if there are just 5 [print] objects, the closest one gets 'p', the next closest gets 'r', etc.

[bgribble]

Initial work added in e5f3cf7, This version highlights matching processors and cycles through them with S-RET. I still want to do the badge approach so I will leave this ticket open