RFR: 8346109: Create JDK taglet for additional preview notes

[Chen Liang]

On Tue, 8 Apr 2025 18:19:21 GMT, Hannes Wallnöfer <hannesw at openjdk.org> wrote:

>> Such usage should be reflected in `testPreviewNoteTag`, which currently does not use it as open/close tags.
>
> The problem is the Taglet class is part of the build system, and I don't think we have a way to test these build classes (I coulndn't find any tests for the other build Taglets). I could replicate the Taglet class in the test, but that doesn't seem like a good solution either.

Can we have a usage example of this tag somewhere then?

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PR Review Comment: https://git.openjdk.org/jdk/pull/23395#discussion_r2033820887