content: --prod flag for capacitor run and capacitor build is inconsistent across frameworks

### URL

https://ionicframework.com/docs/cli/commands/capacitor-run

### Issue Description

Forwarding from this issue: https://github.com/ionic-team/ionic-framework/issues/26411

The Ionic CLI information around the `ionic capacitor run` and `ionic capacitor build` does not reflect what the `--prod` option applies to (Angular only).

We should clarify the documentation, as `vue-cli-service build` creates a production build by default.

Note: We may decide to look into the `--prod` option in the CLI and see if there is a way to apply it consistently for each major framework we support.

Start with the capacitor-run documentation at the linked URL and inspect the corresponding capacitor-build documentation. Compare how the --prod option is described for Angular and how vue-cli-service build behaves by default. Done means the documentation clearly explains the framework-specific behavior and the scope of --prod.

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