feat: Engine CPS (#42)

Making the engine CPS so that it fits properly with the optimizer
pub/sub model.

This is in fact a simplication of the codebase.

Author: AlSchlo

optd-core/src/bridge/from_cir.rs

@@ -59,6 +59,7 @@ pub(crate) fn partial_physical_to_value(plan: &PartialPhysicalPlan) -> Value {
 }
 
 /// Converts LogicalProperties to a HIR Value representation.
+#[allow(dead_code)]
 pub(crate) fn logical_properties_to_value(properties: &LogicalProperties) -> Value {
     match &properties.0 {
         Some(data) => properties_data_to_value(data),

optd-core/src/engine/error.rs

@@ -76,7 +76,7 @@ pub(super) fn eval_binary_op(left: Value, op: &BinOp, right: Value) -> Value {
             })),
 
             // Any other combination of literal types is not supported
-            _ => panic!("Type mismatch in binary operation"),
+            _ => panic!("Invalid binary operation: {:?} {:?} {:?}", left, op, right),
         },
 
         // Array concatenation (joins two arrays)