[lworld+fp16] RFR: 8339252: Add method float16Value() to BigInteger and BigDecimal [v6]

[duke]

On Wed, 4 Sep 2024 21:54:05 GMT, Raffaello Giulietti <rgiulietti at openjdk.org> wrote:

>> This patch adds `float16Value()` to `BigInteger` and `BigDecimal`, as well as `Float16.valueOf(BigDecimal)`.
>
> Raffaello Giulietti has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Added @see to valueOf(BigDecimal).

@rgiulietti 
Your change (at version 4070f4f7f7cd1bcc64d12f7535f77c71e53687bb) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/valhalla/pull/1228#issuecomment-2331031615