[PATCH v2] localedata: Add en_ID locale for Indonesian English

[Gary Dean]

Hello,

This is an updated submission of the en_ID locale, originally proposed 
in 2015
(Bug #19010). This version addresses the feedback from Carlos O'Donell:

- Added the required GNU C Library copyright disclaimer
- Converted all Unicode code points to their associated characters
- Updated to current glibc standards

Changes since v1 (2015):

- Updated to current glibc locale format standards
- Improved LC_MESSAGES by inheriting from en_SG
- Added comprehensive test suite
- Field tested by users over several years

Justification:

Indonesia's English-speaking population has grown significantly:

- Population now 280+ million (was 250M in 2015)
- Tech sector growth (unicorns: Gojek, Tokopedia, Traveloka, etc.)
- ASEAN economic integration increasing English usage
- Remote work trends post-COVID driving English proficiency
- Estimated 10-15 million daily English users

The locale combines:

- British English spelling (standard in Indonesian education)
- Indonesian regional settings (IDR currency, date formats)
- Business-appropriate defaults (24-hour time, ISO dates)

The locale definition and test suite are available at:
https://github.com/Open-Technology-Foundation/en_ID

I'm happy to make any adjustments needed for inclusion.

[BZ #19010]

Regards,

Gary Dean
Yayasan Teknologi Terbuka Indonesia

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