Add support Nx v21

[harrywebdev]

Is your feature request related to a problem? Please describe.
Qwik-nx package cannot be used in Nx v21 because of dependency conflict.

Describe the solution you'd like
Qwik-nx no longer blocks npm install on Nx v21.

Describe alternatives you've considered
I've used it with npm install --force and it seems that the actual package is working well in Nx 21 (just the dependency graph is a problem.)

Additional context

npm error code ERESOLVE
npm error ERESOLVE could not resolve
npm error
npm error While resolving: qwik-nx@3.1.1
npm error Found: @nx/devkit@21.0.3
npm error node_modules/@nx/devkit
npm error   dev @nx/devkit@"21.0.3" from the root project
npm error   @nx/devkit@"21.0.3" from @nx/cypress@21.0.3
npm error   node_modules/@nx/cypress
npm error     dev @nx/cypress@"21.0.3" from the root project
npm error   12 more (@nx/eslint, @nx/eslint-plugin, @nx/jest, @nx/js, ...)
npm error
npm error Could not resolve dependency:
npm error peer @nx/devkit@"^20.7.0" from qwik-nx@3.1.1
npm error node_modules/qwik-nx
npm error   qwik-nx@"3.1.1" from the root project
npm error
npm error Conflicting peer dependency: @nx/devkit@20.8.2
npm error node_modules/@nx/devkit
npm error   peer @nx/devkit@"^20.7.0" from qwik-nx@3.1.1
npm error   node_modules/qwik-nx
npm error     qwik-nx@"3.1.1" from the root project
npm error
npm error Fix the upstream dependency conflict, or retry
npm error this command with --force or --legacy-peer-deps
npm error to accept an incorrect (and potentially broken) dependency resolution.

[dmitry-stepanenko]

done #251

[harrywebdev]

amazing, thank you! 🙏