Update Node.js packages to latest versions

[Copilot]

This PR updates Node.js packages to their latest versions following the established workflow for dependency management in the autorest.java repository.

Changes Made

Package Updates:

• @types/node: ~24.2.0 → ~24.2.1 (typespec-extension)
• eslint: ~9.32.0 → ~9.33.0 (typespec-extension)
• @azure-tools/azure-http-specs: 0.1.0-alpha.25 → 0.1.0-alpha.26 (typespec-tests)

Core Infrastructure:

• Updated the core submodule (microsoft/typespec.git) to the latest main branch
• Regenerated package-lock.json in typespec-extension
• Synchronized test files with the latest TypeSpec changes

Process Followed

The update followed the team's documented workflow:

1. Updated the core TypeSpec submodule to fetch latest upstream changes
2. Used npm-check-updates (ncu) to identify and apply package updates
3. Verified peerDependencies and overrides remain properly aligned
4. Ran npm install to update lockfiles
5. Executed SyncTests.ps1 to regenerate test files based on the updated core

Test Impact

The core submodule update included hierarchy building client refactoring, which resulted in:

• Renamed client classes (HierarchyBuildingClient → AnimalOperationsClient)
• Added new operation-specific clients (DogOperations, PetOperations)
• Updated implementation and test files accordingly

All builds and linting pass successfully with the updated dependencies.

Fixes #3179.

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[weidongxu-microsoft]

/check-enforcer evaluate