feat: adding general shuffle example for any vector size

[manel1874]

This is just a preliminary example for shuffling a vector without any constraint in size. We want to greatly improve on this but we can have it as an example for reference before we include it under nada-numpy.

Note: The example does not support arrays with Rational or SecretRational types.

Optimizations for future reference:

1. Add support for random boolean in nada dsl directly,
2. Avoid truncation,
3. Add support for one_hot_vector as a preprocessing element from nada dsl.

[jcabrero]

The code looks good to me 👍 . Just one small comment, in tests/test_all.py, add this example to the list EXAMPLES. In that way, we test all examples with the CI and ensure they all work with the latest version.