Can the order in which properties are read be more comprehensible?

[gibson042]

https://github.com/tc39/proposal-intl-numberformat-v3/issues/122 pointed out some issues with the order in which NumberFormat reads and reports fields, but those issues exist across ECMA-402 (e.g., https://github.com/tc39/ecma402/pull/709#issuecomment-1382907829 ). We should strive to determine and document guidelines, also changing existing facilities if web-compatible.

[sffc]

TG2 discussion: https://github.com/tc39/ecma402/blob/main/meetings/notes-2025-01-16.md#can-the-order-in-which-properties-are-read-be-more-comprehensible-747

Conclusion:

• Pursue guidelines and spec patterns that can be easily checked against the guidelines
• Backport those patterns in editorial changes to existing APIs
• Consider normative changes to existing APIs