🎯 Changes

This is a continuation of #9986 (which is a continuation of #9893).

This is not intended to be in a reliable state, but can be used as a reference for other PRs for angular. I have not reviewed and cleanup all of the changes yet to have them ready for a release/merge, but I can do it if needed. I used AI mainly for refractors and examples.

Besides updating the docs and adding a couple of examples, this PR adds:

• Hydration helpers with withHydration and provideServerTanStackQueryHydration.
• A separate package for devtools, aligning the behaviour to the rest of the packages (the idea of only adding angular- prefixed packages instead of needing to install the core directly).
• Proper angular testing via analog vite plugin.
• Remove deprecated apis, like provideAngularQuery
• Update some remaining <19 features, like using provideEnvironmentInitializer
• Persister SSR support

I published the packages in my own scope to be used to experiment with them before getting similar changes in main here:

• @benjavicente/angular-query-experimental
• @benjavicente/angular-query-devtools
• @benjavicente/angular-query-persist-client

I am happy to help getting the package out of experimental 👀

✅ Checklist

• I have followed the steps in the Contributing guide.
• I have tested this code locally with pnpm run test:pr.

🚀 Release Impact

• This change affects published code, and I have generated a changeset.
• This change is docs/CI/dev-only (no release).