Add AppcomposerResourceCount telemetry event

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Problem

We're tracking resource counts in the App Composer console, but not in the VS Code extension. This allows for tracking that telemetry event in VSC as well.

Solution

This adds the AppcomposerResourceCount telemetry event, which records the resourceCounts and totalResourceCount values coming from FigAssets.

No testable changes added, as this uses existing telemetry tracking mechanisms.

License

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.