RFR: Add guide section about array types [v3]

[Jorn Vernee]

On Tue, 16 Apr 2024 17:04:10 GMT, Jorn Vernee <jvernee at openjdk.org> wrote:

>> The current guide is missing a section discussing the special handling of array types, for which jextract generates a `$dimensions()` accessor, and indexed getters and setters.
>> 
>> This PR adds a section to the guide discussing this. I've put it at the end of the "Using The Code Generated By Jextract" section. I've put it before the section on nested types though, since it's a little more important I think.
>
> Jorn Vernee has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix samples link

Looks like the github actions broke again due to a jdk 22 version bump, resulting in different paths on mac (and windows too I think). Will take a look at the separately.

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PR Comment: https://git.openjdk.org/jextract/pull/236#issuecomment-2059638453