Refactor/dropdown menu (#279)

* Created dropdown menu UI component with story

* Added all components for composing Dropdown Menus

* Better component naming and reordered stories

* Solved comment thread from review

front/src/modules/ui/components/editable-cell/types/EditableRelationCreateButton.tsx

@@ -15,5 +15,5 @@ export const EditableRelationCreateButton = styled.button`
   width: 100%;
   height: 31px;
   background: none;
-  gap: 8px;
+  gap: ${(props) => props.theme.spacing(2)};
 `;