RFR: 8344706: Implement JEP 512: Compact Source Files and Instance Main Methods [v8]

[Vicente Romero]

On Thu, 1 May 2025 17:48:22 GMT, Jan Lahoda <jlahoda at openjdk.org> wrote:

>> This is a PR that implements JEP: Compact Source Files and Instance Main Methods. Changes include:
>> - `java.io.IO` moved to `java.lang.IO`, and no longer uses `System.console()` to implement the methods (thanks to @stuart-marks)
>> - `java. ... .IO` is no longer automatically imported in any compilation unit
>> - the feature is finalized (i.e. no longer requires `--enable-preview`)
>
> Jan Lahoda has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Updating copyright year.

last changes lgtm

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Marked as reviewed by vromero (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/24438#pullrequestreview-2810409833