Added ipv6 scoped architecture text format

[anjoshigor]

This PR aims to resolve #972.

As stated by RFC 4007:

a common notation to specify the scope zone, an implementation SHOULD
support the following format:
            <address>%<zone_id>
 where
      <address> is a literal IPv6 address,
      <zone_id> is a string identifying the zone of the address, and
      `%' is a delimiter character to distinguish between <address> and
      <zone_id>.

These are some examples:

fe80::1234%1
ff02::5678%5
ff08::9abc%10
fe80::1234%ne0
ff02::5678%pvc1.3
ff08::9abc%interface10

Due to that, I modified isIP.js to behave accordingly when a % character is found. Tests were also enhanced to fulfill this new requirement.

Please, any doubt contact me 🤘

[StephenWall]

const blocks = addressAndZone[0].split(':');

[anjoshigor]

Just fixed it! :)