build: update to Angular 19-rc

[timdeschryver]

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] The commit message follows our guidelines: https://github.com/ngrx/platform/blob/main/CONTRIBUTING.md#commit
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Documentation has been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[x] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Other... Please describe:

What is the current behavior?

Closes #

What is the new behavior?

Does this PR introduce a breaking change?

[x] Yes
[ ] No

Other information

Most of the changed files (including failing tests) are related to standalone becoming the default. We can create follow-up issues to fix this in our tests, migrate the example app, and remove the data example app.

[netlify[bot]]

✅ Deploy Preview for ngrx-io canceled.

Name	Link
🔨 Latest commit	dad09f21e76ccf5b20ff405d9ffb108e14d24474
🔍 Latest deploy log	https://app.netlify.com/sites/ngrx-io/deploys/67325affa94871000824b410