Angular examples and dependencies improvements

[arnoud-dv]

• tslib should be a dependency, see https://angular.io/guide/angular-package-format#tslib
• ng-packagr as dev dependency of angular package as in Query. We try to keep dependencies local where applicable
• copied .devcontainer.json files from TanStack Query to Angular examples so that they are run as webcontainer on Code Sandbox. Angular CLI works more reliable in dev / web containers.

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