Sorting support for primitive arrays

**Is your feature request related to a problem? Please describe.**

The sort function does not support sorting primitive arrays like below
```sort(["foo", "bar", "foobar"])```

**Describe the solution you'd like**
Support the example above

Start by locating the sort function implementation and its existing tests in the CXEL runtime, then trace how array literals are represented and passed to that function. Add coverage for sort(["foo", "bar", "foobar"]) and verify that the expression evaluates to a sorted primitive array.

Written by the indexing model from the issue text.