docs: ja_JP: Start translation of submitting-patches

docs: ja_JP: Start translation of submitting-patches

Start a new Japanese translation of
Documentation/process/submitting-patches.rst.

Instead of moving the outdated 2011
translation (SubmittingPatches), we are starting a fresh translation of
the current English document.

This patch adds the initial file structure, the warning about the
document being under construction, and the translation of the
introduction section.

The translation work will be done incrementally.

Suggested-by: Akira Yokosawa <akiyks@gmail.com>
Link: https://lore.kernel.org/298d3a9c-41c1-4cbd-b4ab-d3009df9388c@gmail.com/
Signed-off-by: Akiyoshi Kurita <weibu@redadmin.org>
Reviewed-by: Akira Yokosawa <akiyks@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Message-ID: <20260120154543.2063635-1-weibu@redadmin.org>