feat: add contract extension request functionality

- Implemented  method in  to allow customers to request an extension for expired contracts.
- Added  component in  for users to initiate extension requests.
- Updated  to include logic for handling extension requests for expired contracts.
- Enhanced  to display extension request options and status.
- Created migration to add  and  columns to the contracts table.
- Added unit tests for contract extension request and handling in .
- Defined DTOs for request and extension in .
- Updated types in  to include new fields related to contract extensions.

apps/edr-freight-web/backoffice/src/constants/URLS.ts

@@ -285,6 +285,7 @@ export const URL_CONSTANTS = {
     STAFF_CANCEL: (id: string) => `/contracts/${id}/staff/cancel`,
     SUSPEND: (id: string) => `/contracts/${id}/suspend`,
     RESUME: (id: string) => `/contracts/${id}/resume`,
+    EXTEND: (id: string) => `/contracts/${id}/extend`,
     APPROVE_STEP: (id: string, stepId: string) =>
       `/contracts/${id}/approval-steps/${stepId}/approve`,
     REJECT_STEP: (id: string, stepId: string) =>