[Christian BR (ChrisesDK)]

Summary

Adds generic localization support to the current React-based MakeCode Tutorial Tool and forwards the active locale to embedded MakeCode editors.

Changes

• initializes Tutorial Tool localization using the existing PXT localization runtime
• adds Tutorial Tool strings to the normal PXT localization extraction and publication pipeline
• adds TranslationsKind.TutorialTool runtime support
• localizes 9 user-facing React Tutorial Tool strings
• forwards lang / forcelang to embedded MakeCode editors while preserving existing locale parameters
• adds locale forwarding support to the legacy Tutorial Tool iframe path without claiming to localize the legacy shell
• adds focused tests for locale forwarding, default-English behavior, extraction, and runtime catalog loading

Validation

• gulp tutorialtoolTest - 11 passing
• Tutorial Tool extraction - 36 files scanned, 9 keys extracted
• gulp pxtlib - passed
• gulp testpxteditor - 66 passing
• git diff --check - passed

The full React build was not run locally because the local Tutorial Tool dependency installation does not contain react-app-rewired. The standalone Tutorial Tool typecheck is also blocked by the existing pxtarget.d.ts types configuration issue; neither issue is introduced by this patch.

Scope

This PR is generic and does not contain Danish-specific translations.

Out of scope:

• legacy Tutorial Tool shell localization
• shared legal/footer localization
• static no-JavaScript fallback localization
• target-specific locale enablement
• generated variable / SpriteKind display localization handled separately in Localize generated variable and SpriteKind labels without changing identity #11615