Add supported version for Mage-OS 2.3.0

[rhoerr]

Summary

Adds Mage-OS 2.3.0 to the supported-version CI matrix, aligned with upstream Magento 2.4.8-p5 (released 2026-05-12). 2.3.0 is a new minor line; previous 2.2.x line is marked EOL on the same day.

Changes

• supported-version/src/versions/mage-os/individual.json
  • Set 2.2.2 EOL → 2026-05-13
  • Add 2.3.0 entry: upstream: 2.4.8-p5, release 2026-05-13, EOL 2029-05-13. Service versions carried over from 2.2.x (PHP 8.4, composer 2.9.7, MySQL 8.4, OpenSearch 2.19.1, RabbitMQ 4.0, Redis 7.2, Varnish 7.6, nginx 1.26).
• supported-version/src/versions/mage-os/composite.json
  • Set >=2.2 <2.3 EOL → 2026-05-13
  • Add >=2.3 <2.4 range (release 2026-05-13, EOL 2029-05-13)
  • Update bare mage-os/project-community-edition (default) and :next to the new release / EOL dates
• supported-version/src/kind/get-currently-supported.spec.ts
  • Add 2026-05-13 → mage-os:2.3.0 case
• supported-version/dist/index.js rebuilt via npm run build

Notes

• composer: 2.9.7 retained for the new entry, matching the rest of the Mage-OS line (upstream Magento 2.4.8-p5 ships 2.8.12; Mage-OS has been ahead on composer since 1.1.0).
• 2.4.8+ uses the opensearch key (no elasticsearch).

Build & test

$ npm run build
> npx esbuild --outfile=dist/index.js --platform=node --bundle --minify src/index.ts
  dist/index.js  496.6kb
  Done in 22ms

$ npm test
Test Suites: 12 passed, 12 total
Tests:       111 passed, 111 total

New spec case supportedVersions for 2026-05-13T00:00:01Z passes; all preexisting cases still green.

Test plan

• npm run build clean
• npm test — 111/111 pass, including new 2.3.0 release-day case
• Verify in CI that the rendered matrices for default, :next, and >=2.3 <2.4 produce the expected service versions on/after 2026-05-13