Expands CLI support with output forms and decoding

Adds CLI options for compiling to a Tree Calculus, AST, Ternary, and
ASCII tree view. Adds CLI command for attempted decoding of a compiled
result to Number/String/List.

src/Research.hs

@@ -18,16 +18,6 @@ apply (Fork (Fork a1 a2) a3) Leaf       = a1
 apply (Fork (Fork a1 a2) a3) (Stem u)   = apply a2 u
 apply (Fork (Fork a1 a2) a3) (Fork u v) = apply (apply a3 u) v
 
-reduce :: T -> T
-reduce expr =
-  let next = step expr
-  in if next == expr then expr else reduce next
-
-step :: T -> T
-step (Fork left right) = reduce (apply (reduce left) (reduce right))
-step (Stem inner) = Stem (reduce inner)
-step t = t
-
 -- SKI Combinators
 _S :: T
 _S = Fork (Stem (Fork Leaf Leaf)) Leaf