[foreign-memaccess+abi] RFR: 8291639: Improve the ability to visualize a MemorySegment in human readable forms [v17]

[Per Minborg]

On Mon, 5 Sep 2022 20:42:19 GMT, Gavin Ray <duke at openjdk.org> wrote:

>> Per Minborg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update MemoryInspection JavaDoc
>
> I just want to say thanks again for how useful this functionality is
> 
> With latest changes, I've got a demo of visualizing the members of a database's Heap File pages buffer 
> 
> This is saving me so much headache in debugging and developing.
> 
> ![image](https://user-images.githubusercontent.com/26604994/188510707-4e4a7384-5fde-4cf9-a580-fc3da95dd844.png)
> 
> ![image](https://user-images.githubusercontent.com/26604994/188510679-7f9f7a1a-1f07-4431-92e6-39ba76863c29.png)

@GavinRay97 We are going to split this PR into two. This one will only contain the HexFormat-specific parts. The other is here: https://github.com/openjdk/panama-foreign/pull/715

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PR: https://git.openjdk.org/panama-foreign/pull/695