Doug Parker e041f9483e refactor(core): pass AbortSignal to WebMCP tools to handle cancellation
This forwards the `AbortSignal` natively supplied by Chrome 153.0.8009.0's update to `registerTool` executions down into the Angular context. This helps tools gracefully handle execution cancellations initiated by agents or users, preventing unnecessary background work and leaking resources.

We combine the injector/component destruction abort signals with the native WebMCP execution cancellation signals so the underlying tools correctly cancel long-running requests without producing invalid states.

Justification:
https://groups.google.com/a/chromium.org/g/chrome-ai-dev-preview/c/9291sjhIRz0/m/RFuyRrs5AAAJ
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Generates Angular code and provides architectural guidance. Trigger when creating projects, components, services, or HTTP communication, or for best practices…
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