New starter apps

[danielleroux]

Integrate new ix starter apps for angular, react and vue.

[gemini-code-assist]

Code Review

This pull request refactors and updates the Angular, React, and Vue starter templates to use the latest versions of Siemens iX (v5) and other core dependencies, while streamlining the project structures and migrating tests to Vitest. The code review feedback focuses on improving the Angular starter by leveraging the built-in routerLinkActive directive instead of a custom route-matching helper, which simplifies the main application component. Additionally, the feedback recommends removing unused imports in the configuration files and implementing safer null/undefined checks when handling form input events in both the Angular and Vue starters.

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