chore: rename package to @ngrx-toolkit/core

[rainerhahnekamp]

Summary

• rename the v22 npm package to @ngrx-toolkit/core
• update demo imports, documentation examples, TypeScript aliases, repository links, and the redux-connector entry point
• add v22 migration notices and mark the new scoped package for public publication

Validation

• full lint, unit-test, library-build, and demo-build suite passes
• 30 test suites pass with 364 tests passing, 1 skipped, and 3 todo
• formatting and diff checks pass
• package dry run produces @ngrx-toolkit/core@22.0.0 with both entry points

Local environment notes

• Playwright reached the demo server but Chromium could not launch locally with spawn error -88; hosted CI should provide the e2e result
• the docs build still hits existing TypeScript ignoreDeprecations and broken /docs/api/globals configuration errors unrelated to this rename

[michael-small]

A few outstanding mentions about architects that I am wondering about

• New documentation domain? There is still links to https://ngrx-toolkit.angulararchitects.io in various places like the two README.md
• Demo code still uses various angulararchitects.io endpoints
• Docs footer copyright notice
• Your title in const teamMembers for the Team doc page

[rainerhahnekamp]

@michael-small we can leave the endpoints as they are. that's fine. and we will move the website later.

so i think this one is ready?