Update Auth0 Version to V5 use Legacy (Do Not Merge)

[developerkunal]

🔧 Changes

This pull request upgrades the auth0 dependency to version 5.0.0 and updates the codebase to use the auth0/legacy import path for all Auth0-related clients and types.
This approach allows us to adopt the new Auth0 SDK while avoiding breaking changes and maintaining compatibility with existing usage patterns.

The auth0/legacy entry point provides backward-compatible exports for the previous v4 client interfaces, enabling a smooth, incremental migration path while we progressively adopt the newer SDK structure.

Dependency and import path updates

• Upgraded the auth0 dependency from v4.32.0 → v5.0.0 in package.json.

• Updated all Auth0-related imports (e.g. ManagementClient, AuthenticationClient, Client, ResourceServer, etc.) to use the auth0/legacy import path instead of the root auth0 package.
  This ensures full backward compatibility while allowing partial adoption of v5 features.

• Updated references in affected modules such as:

  • src/context
  • src/tools/auth0/handlers
  • Related handler utilities

ESLint configuration update

• Added "import/core-modules": ["auth0/legacy"] under ESLint settings to treat the new import path as a recognized core module, preventing false-positive lint errors.

Template string formatting improvements

• Simplified template string formatting for warning messages in:

  • src/context/index.ts
  • src/tools/auth0/handlers/default.ts

• Removed unnecessary line breaks and expressions for improved readability.

📚 References

• Auth0 SDK v5.0.0 release notes (internal migration guidance)
• Internal discussion on incremental SDK adoption strategy

🔬 Testing

• Verified CLI commands continue to function correctly using the legacy SDK interfaces.
• Confirmed no breaking changes in existing configuration or tenant deployment workflows.
• Validated build and lint tasks pass under Node.js ≥20.18.1.

📝 Checklist

• All new/changed/fixed functionality is covered by tests (or N/A)
• Documentation and comments updated to reflect the new auth0/legacy import path (or N/A)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 81.25000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 80.17%. Comparing base (f0fc1b9) to head (d8ee9f1).

Files with missing lines	Patch %	Lines
src/context/index.ts	66.66%	1 Missing and 1 partial ⚠️
src/tools/auth0/handlers/scimHandler.ts	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1177   +/-   ##
=======================================
  Coverage   80.17%   80.17%           
=======================================
  Files         134      134           
  Lines        5100     5100           
  Branches     1014     1014           
=======================================
  Hits         4089     4089           
  Misses        579      579           
  Partials      432      432           

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