⚡ (openai) Add Messages sequence type

To make it easy to just plug a sequence of user / assistant messages to Chat completion task

Closes #387

apps/builder/src/features/variables/components/VariablesButton.tsx

@@ -48,6 +48,7 @@ export const VariablesButton = ({ onSelectVariable, ...props }: Props) => {
       <Portal containerRef={parentModalRef}>
         <PopoverContent w="full" ref={popoverRef}>
           <VariableSearchInput
+            initialVariableId={undefined}
             onSelectVariable={(variable) => {
               onClose()
               if (variable) onSelectVariable(variable)