Support for arrays in `startsWith` (and, maybe, `endsWith`)

**Use case**

Would be quite useful for handling tree-like structured data where the node paths are specified as arrays of names or IDs.

**Describe the solution you'd like**

The desired behavior would be like this:
```
startsWith([1, 2, 3, 4], [1, 2])  -- true (1)
startsWith(['qwe', 'rty', 'ui', 'op'], ['qwe', 'rty'])  -- true (1)
startsWith([1, 2, 3, 4], [2, 4])  -- false (0)
startsWith([1, 1, 2, 2], [1, 2])  -- false (0)
```

And similarly, for `endsWith`

**Describe alternatives you've considered**

Something like `arraySlice(first, 1, length(second)) = second`

But `startsWith` would be much more readable, harder to make a mistake in and, probably, can be better optimized (i.e. might not have to create new objects like `arraySlice` does)
{
    while (!src.isEnd())
    {
        writeSlice(src.getSliceFromLeft(offset), sink);
        sink.next();
        src.next();
    }
}
template <typename Source, typename Sink>
void NO_INLINE sliceFromLeftConstantOffsetBounded(Source && src, Sink && sink, size_t offset, ssize_t length)
{
    while (!src.isEnd())
    {
        ssize_t size = length;
        if (size < 0)
            size += static_cast<ssize_t>(src.getElementSize()) - offset;
        if (size > 0)
            writeSlice(src.getSliceFromLeft(offset, size), sink);
        sink.next();
        src.next();
    }
}
template <typename Source, typename Sink>
void NO_INLINE sliceFromRightConstantOffsetUnbounded(Source && src, Sink && sink, size_t offset)