chore(app-platform): add packageManager field to package.json

[kabaros]

This PR adds packageManager field to package.json.

This change does not affect the way developers currently run and work with apps. It just allows them to - optionally - use corepack to manage package managers (but they can keep using the globally installed yarn 1 in their systems if they wish to).

The change makes it possible for apps to eventually seamlessly adopt a more modern package manager, without caring about installing and switching between package managers. Switching to different package managers for the platform apps will become possible once the work we are undertaking in app-platform to decouple cli-app-scripts from yarn 1 is done (currently can be tested on alpha release of app-platform).

dhis2/app-platform#941

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This PR was automatically created using a multi-gitter script.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[dhis2-bot]

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