core/packs/pack-lang-common: Disable flyspell

It interferes with auto completion, so disable it until the conflict can
be resolved.

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>
core/packs/pack-files: Add dired-details+

Signed-off-by: Gergely Nagy <algernon@madhouse-project.org>