Refactor and add state to debugger.

src/api/eval.rs

@@ -184,10 +184,7 @@ impl Engine {
         scope: &mut Scope,
         ast: &AST,
     ) -> RhaiResultOf<T> {
-        let global = &mut GlobalRuntimeState::new();
-
-        #[cfg(feature = "debugging")]
-        global.debugger.activate(self.debugger.is_some());
+        let global = &mut GlobalRuntimeState::new(self);
 
         let result = self.eval_ast_with_scope_raw(scope, global, ast, 0)?;