Support Node 24/26

[carlansley]

Fixes #13.
Fixes #31.

• CI now targets current Node 24 and 26 releases, which ship ICU 78.3/CLDR 48.
• Updated formatting tests for CLDR 48’s zero fraction digits for COP, HUF, IDR, and PKR. The library still preserves their ISO 4217 minor units as 2.
• Removed RSD from the exception list because current Node Intl reports two digits.
• Added SLE, XCG, ZWG, VED, and XAD, plus recent country currency transitions.
• Added AQ, FK, and GS; Antarctica follows CLDR’s XXX “no currency” representation (fyi @le-cong).
• Added regression coverage ensuring every Intl.supportedValuesOf('currency') code exists locally.

NOTE: coverage action is temporarily disabled, since the tests in main no longer work due to the updated ICU in the latest versions of Node

[Copilot]

🔵 Needs a closer look

Runtime, currency behavior, data, and release workflows change together and require final human review.

Review details

• Files reviewed: 25/26 changed files
• Comments generated: 0 new
• Review effort level: Balanced

[github-actions]

Beta Published - Install Command: npm install @checkdigit/currency@9.0.0-PR.32-b11c