refactor(editor): ♻️ Undo / Redo buttons + structure refacto

Yet another huge refacto... While implementing undo and redo features I understood that I updated the stored typebot too many times (i.e. on each key input) so I had to rethink it entirely. I also moved around some files.

apps/builder/components/shared/Graph/Nodes/StepNode/StepNodeContextMenu.tsx

@@ -0,0 +1,17 @@
+import { MenuList, MenuItem } from '@chakra-ui/react'
+import { TrashIcon } from 'assets/icons'
+import { useTypebot } from 'contexts/TypebotContext/TypebotContext'
+
+export const StepNodeContextMenu = ({ stepId }: { stepId: string }) => {
+  const { deleteStep } = useTypebot()
+
+  const handleDeleteClick = () => deleteStep(stepId)
+
+  return (
+    <MenuList>
+      <MenuItem icon={<TrashIcon />} onClick={handleDeleteClick}>
+        Delete
+      </MenuItem>
+    </MenuList>
+  )
+}