Add ai.kr, io.kr, it.kr, me.kr

[groundcat]

This PR is created to fix #2406 by adding four new second-level domains under South Korea's .kr TLD: ai.kr, io.kr, it.kr, and me.kr.

To quote @Renyu106 from #2406:

the registry for South Korea’s .kr ccTLD. On March 5, 2025, KISA launched four new second-level domains—ai.kr, io.kr, it.kr, and me.kr—the first new additions in 22 years. These domains have been in preparation since 2024 and are now open for public registration.

I've verified these additions through multiple authoritative sources:

1. The Korean Internet & Security Agency (KISA) is the official registry for South Korea's .kr ccTLD according to IANA's database: https://www.iana.org/domains/root/db/kr.html

2. KISA's official registry website (http://www.nic.or.kr/) confirms these new second-level domains on their 3-depth domain page: https://www.nic.or.kr/jsp/customer/privacy_3depthDomain.jsp

3. KISA formally announced the March 5, 2025 launch of these four new second-level domains on their website: https://www.kisa.or.kr/401/form?postSeq=3401

These second-level domains are now open for public registration as of today (March 5, 2025).

[dnsguru]

The updates were presented at APTLD in February 2025 also. APTLD87 Session by Boyoung Kim from KISA

This is all aligned and matches the submitted changes.

[dnsguru]

• Follows Sorting Guidelines
• Connective, 3p verification of change coming from authoritative source exists to allow exemption on DNS _PSL entry verification.

APPROVED