Add StringViewArray implementation and layout and basic construction + tests

[alamb]

This is part of the larger project to implement StringViewArray -- see #5374

After #5468 we will next need to implement StringViewArray

For inspiration I think you can look at #4585

(specifically arrow-array/src/array/byte_view_array.rs https://github.com/apache/arrow-rs/pull/4585/files#diff-160ecd8082d5d28081f01cdb08a898cb8f49b17149c7118bf96746ddaae24b4f)

Basic tasks:

1. CreateUtf8ViewArray and implement Array for it. This should follow the outline from Add StringViewArray and BinaryViewArray (#4253) #4585 and implement a similar API to StringArray https://docs.rs/arrow/latest/arrow/array/type.StringArray.html
2. Add documentaton for new array, with documentation
3. Examples of constructing the array in docs
4. Tests for basic creation APIs (like new() and new_unchecked, value(), is_null() etc).

Potentially: implement pretty printing for Utf8ViewArray via ArrayFormatter, though this could be done as a separate ticket / PR.

[ariesdevil]

Please assign me, thx :)

[alamb]

I plan to merge #5470 later today -- I don't expect substantial changes, so if you would like to start on this issue, you could probably make a branch from #5470 and rebase once we merge that

[alamb]

Noce that #5470 is merged I think this ticket is unblocked and ready to go

Note I think this ticket will be somewhat of a bottleneck. Once it is done I think we can start implementing other features in parallel (like IPC support, cast, filter, etc)

[tustvold]

label_issue.py automatically added labels {'arrow'} from #5481

[tustvold]

label_issue.py automatically added labels {'parquet'} from #4585