feat(dhcp): support multiple dhcp ranges

[m-dilorenzi]

This pull request enhances the DHCP interface management in the DNS/DHCP standalone components by adding support for multiple DHCP IP ranges per interface. It updates the data model, form UI, and validation logic to handle multiple ranges, improves user feedback, and updates translations accordingly.

• changed the DhcpInterface type to use a ranges array (with first and last properties) instead of single first/last fields, enabling multiple IP ranges per DHCP interface
• updated the DHCP interface edit drawer (EditDhcpInterfaceDrawer.vue) to allow adding/removing multiple IP ranges, with corresponding UI controls and placeholders
• adjusted the DHCP card display (DhcpCard.vue) to show all configured IP ranges instead of just one
• implemented comprehensive validation for each IP range, including checks for required fields, valid IP addresses, range order, and ensuring IPs are within the interface's class range

Closes: NethServer/nethsecurity#1448