add items per wagon map to cargo types and sync bulk rate units

- Implemented  in the  to manage the physical item capacity for each wagon type.
- Added a new migration to create the  column in the  table.
- Introduced  method in  to update rate units when cargo type unit of measure changes.
- Updated booking calculations to consider items per wagon for break-bulk cargo.
- Refactored various components to utilize the new items fit logic and ensure consistent date formatting across the application.
- Added tests for the new display timezone functionality to ensure consistent date/time representation across different user settings.

packages/ui-common/package.json

@@ -7,6 +7,7 @@
   "types": "./src/index.ts",
   "exports": {
     ".": "./src/index.ts",
+    "./display-timezone": "./src/lib/display-timezone.ts",
     "./styles.css": "./dist/index.css",
     "./theme.css": "./src/styles/theme.css"
   },