work out some initial direction for code gen

examples/sample/src/sample.ak

@@ -1,3 +1,11 @@
 pub type ScriptContext {
-  thing: String,
+    thing: String
+}
+
+pub type Datum {
+  something: String,
+}
+
+pub fn thing(a: Datum, b){
+    a.something == b
 }

examples/sample/src/scripts/swap.ak

@@ -1,10 +1,7 @@
+use sample
 use sample/mint
 use sample/spend
 
-pub type Datum {
-  something: String,
-}
-
 pub type Redeemer {
   Buy { id: Int }
   Sell(Int)