feat(web2): add IPv6 configuration tab

[marcellorinaldo]

This PR adds a net tab "IPv6" to the networking section that allows to configure IPv6-related settings.

Related Issue: N/A.

Description of the solution adopted: Summary of changes:

• Added UI tab
• Added validations
• Refactor of the network tabs orcherstrator code
• Backend code not implemented in this PR, will be separate

Screenshots:

Manual Tests:

• Address Generation Mode and Privacy are enabled only when Configure = SLAAC
• When Status = Enabled for LAN and Configure = Manually then only IP address and Subnet Mask are editable.
• When Status = Enabled for WAN and Configure = Manually then WAN Priority, IP address, Subnet Mask, Gateway, and DNS Servers are editable.
• When Status = Enabled for WAN and Configure != Manually the DNS Servers is editable
• WAN Priority is enabled only when Status = Enabled for WAN
• All fields are disabled when Status = Disabled or a Loopback interface is selected
• Tabs order (IPv4, IPv6, Wireless, DHCPv4&NAT, Modem, etc.) is the same as prior this PR
• WAN Priority accepts only integers > -1
• Subnet mask accepts only integers between 1 and 128
• Fields that accept IPv6 addresses have working validation, even with shortened addresses. Some test cases can be found below
• IPv6 tab is shown only on generic profiles
• Information hints are correctly shown when hovering over the enabled elements

IPv6 addresses (positive) test cases:

• 2001:0000:3238:DFE1:0063:0000:0000:FEFB
• 2001:0000:3238:DFE1:63:0000:0000:FEFB
• 2001:0000:3238:DFE1:63::FEFB
• 2001:0:3238:DFE1:63::FEFB
• ::
• ::1
• FE80::

Any side note on the changes made: N/A.

[sfiorani]

Tested on Raspberry Pi, with generic-aarch64 generic profile: everything is ok