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)
{
    using NativeU = NativeType<U>;
    sink.elements.resize(sink.current_offset + slice.size);
    for (size_t i = 0; i < slice.size; ++i)
    {
        const auto & src = slice.data[i];
        auto & dst = sink.elements[sink.current_offset];
        if constexpr (is_over_big_int<T> || is_over_big_int<U>)
        {
            if constexpr (is_decimal<T>)
                dst = static_cast<NativeU>(src.value);
            else
                dst = static_cast<NativeU>(src);
        }
        else
            dst = static_cast<NativeU>(src);
        ++sink.current_offset;
    }
}
inline ALWAYS_INLINE void writeSlice(const StringSource::Slice & slice, StringSink & sink)
{
    sink.elements.resize(sink.current_offset + slice.size);
    memcpySmallAllowReadWriteOverflow15(&sink.elements[sink.current_offset], slice.data, slice.size);
    sink.current_offset += slice.size;
}
inline ALWAYS_INLINE void writeSlice(const StringSource::Slice & slice, FixedStringSink & sink)