Redo debugger language

[MarkMcCaskey]

I'm interested in redoing the debugging language to compile down into lambda calculus for easier type checking and evaluation. Additionally/alternatively maybe I'll make a datalog implementation in Rust and use it here to allow for some more interesting queries and/or manipulations.

[MarkMcCaskey]

It's currently being replaced with ketos. It's set up, but functions need to be written to return certain values, or a post-processing function is needed to map certain symbols to debugger actions.