feat: Upgrades to Angular 22

[erikm-of]

BREAKING CHANGE: Angular 22 required

Closes #327

[erikm-of]

@maxime-cloudnc Angular 22 requires typescript 6 and in that version strict mode has become the default. Making the library strict requires some effort, so for now I just disabled strict.

On a side note, with Signal Forms now production ready. we (our company) is actively investigating if we can migrate to Signal Forms in the near feature, meaning we might migrate away from ngx-sub-form.

[zak-cloudnc]

thanks @erikm-of , yes we are also looking to move away from ngx-sub-form once we adopt signal forms, and if that goes well we are likely to sunset the project.

It was always the hope that angular would incorporate something into the core that removed the need for this library, maybe that time has arrived at long last.

[github-actions]

🎉 This PR is included in version 15.0.0 🎉

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