update: Add a left drawer to improve workbook management (#453)

* update: add leftbar to app

* style: a few cosmetic changes

* update: allow pinning workbooks

* style: show ellipsis button only on hover

* update: add basic responsiveness

* style: use active state when file and help menus are open

* style: increase transition time

* update: allow duplication of workbooks

* chore: standardize menus

webapp/app.ironcalc.com/frontend/src/components/WelcomeDialog/WelcomeDialog.tsx

@@ -106,7 +106,7 @@ const DialogHeaderTitleSubtitle = styled("span")`
   color: #757575;
 `;
 
-const DialogHeaderLogoWrapper = styled("div")`
+export const DialogHeaderLogoWrapper = styled("div")`
   display: flex;
   flex-direction: row;
   align-items: center;