Global error handling on Vue application

**User story:** As a SIMS team, we need to have global error handling across the application so that users have better indication when unexpected errors occur.

**Acceptance Criteria**

- [ ] Named errors (ApiProcessError)
- [ ] 503 - maintenance page
- [ ] Any other should be considered a business error for the application to process.
- [ ] Non-named errors (ApiProcessError)
- [ ] Create a new page, if not exist yet, for redirecting unexpected. Reuse some of the Figma images, as already done for 403 and 404.
- [ ] 503 - server unavailable, redirect unexpected.
- [ ] 404, 403, redirect to specific page.
- [ ] When the token expires, redirect to the client-specific login page.
- [ ] Any other HTTP error redirects to unexpected.