Update the NTFS driver documentation to reflect the update implementation.
Remove outdated sections (web site, old features list, known bugs,
volume/stripe sets with MD/DM driver, limitations of old driver), add a
concise overview of current driver features and long-term maintenance
focus, add a utilities support section pointing to ntfsprogs-plus project
and update mount options list with current supported options.
Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>