RFR: 7903799: apidiff: add initial code [v2]

[Jonathan Gibbons]

On Thu, 22 Aug 2024 01:42:58 GMT, Iris Clark <iris at openjdk.org> wrote:

>> Jonathan Gibbons has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   fix text about  CodeTools project
>
> CONTRIBUTING.md line 5:
> 
>> 3: APIDiff is part of the OpenJDK [CodeTools] Project.
>> 4: 
>> 5: Please see <https://openjdk.java.net/contribute/> for how to contribute.
> 
> openjdk.org.  Similar comment for line 8.

Fixed

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PR Review Comment: https://git.openjdk.org/apidiff/pull/2#discussion_r1727547895