UI: Update to Angular 16

[sfeilmeier]

This PR targets the version update to Angular 16. Relevant documents:

• https://update.angular.io/?v=15.0-16.0
• https://angular.io/guide/update-to-version-16
• https://ionicframework.com/docs/updating/7-0 (optional)

Current blockers are:

• ngx-spinner - but that will change soon https://github.com/Napster2210/ngx-spinner/issues/258

• ng2-charts - we are still on 2.9.4, which is incompatible with Angular Ivy https://www.chartjs.org/docs/latest/migration/v3-migration.html

  • PR: #2392

• angular-mydatepicker - is also not compatible with Ivy and seems to be unmaintained: https://github.com/kekeh/angular-mydatepicker/issues/116

• Refactoring of widgets before going to migrate:

  • Consumption
  • Grid
  • FixDigitaloutput
  • SingleThreshold
  • Storage ....

Features:

• https://github.com/OpenEMS/openems/pull/2287#issuecomment-1695747282

TODO

• ng2-charts update to version 5 necessary Compatibility

[sfeilmeier]

@lukasrgr: FYI. Will use this PR to join efforts

[lukasrgr]

@sfeilmeier we could have saved some resources and time, if you had told me earlier, that you wanted it to do like this =)

[lukasrgr]

@sfeilmeier the best procedure would be updating chartjs and ng2 charts seperately from this PR, what do you think?

[sfeilmeier]

@lukasrgr Sometimes I just still like to write some code myself :-). I agree, the other tasks (chartjs + replacement for datepicker) should be done in separate PRs. Just started this PR to track the general process.

[lukasrgr]

Before updating angular, first whole history has to be refactored, to make the transition easier.

Angular 16 currently does not support chartjs

[sfeilmeier]

Referencing this helpful comment by @Byonnem

https://community.openems.io/t/recommended-angular-version-date-19-06-2023/1677