Split "nan-Latn" into "nan-Latn-pehoeji", "nan-Latn-tailo"

[winstonsung]

Describe the problem

nan-Latn currently use 2 orthography/romanization system.

BCP 47 variant subtags " pehoeji ", " tailo " were requested and added to Language Subtag Registry on 2024-03-04.

https://www.iana.org/assignments/language-subtag-registry/language-subtag-registry

We need 2 variants to be listed separately instead of single "nan-Latn"/"nan".

Describe the solution you would like

• Add language tags "nan-Latn-pehoeji", "nan-Latn-tailo".
• Redirect "nan-Latn" to "nan-Latn-pehoeji".

Describe alternatives you have considered

No response

Screenshots

No response

Additional context

%%
Type: variant
Subtag: pehoeji
Description: Hokkien Vernacular Romanization System
Description: Pe̍h-ōe-jī orthography/romanization
Added: 2024-03-04
Prefix: nan-Latn
Comments: Modern Hokkien Vernacular Romanization System, evolved from
  the New Dictionary in the Amoy by John Van Nest Talmage in 1894
%%

%%
Type: variant
Subtag: tailo
Description: Taiwanese Hokkien Romanization System for Hokkien
  languages
Description: Tâi-lô orthography/romanization
Added: 2024-03-04
Prefix: nan-Latn
Comments: Taiwanese Hokkien Romanization System (Tâi-lô) published in
  2006 by the Taiwan Ministry of Education
%%

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