fix: Hide transaction checkboxes on mobile (#109)

## Summary
- Hides the select/checkbox column in the transactions table on mobile
viewports (below `md` breakpoint) using `hidden md:table-cell` on the
column meta

### Mobile Screenshot
![Mobile
transactions](https://raw.githubusercontent.com/whisper-money/whisper-money/mobile-improvements/.github/screenshots/mobile-transactions.png)

resources/js/components/transactions/transaction-columns.tsx

@@ -51,6 +51,9 @@ export function createTransactionColumns({
     return [
         {
             id: 'select',
+            meta: {
+                cellClassName: 'hidden md:table-cell',
+            },
             header: ({ table }) => (
                 <Checkbox
                     checked={