netvor/saturnin-demo: Working Saturnin-based meta-command

Working Saturnin-based meta-command

Alois Mahdal 6c1727fab5 Add greeter with exposed module Split saturnin-demo to a double-package distribution, where one package provides core saturnin-demo with its subcommands and the other provides a Shellfu/Bash module saturnin_demo_greet.sh used by the first one.		7 lat temu
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source	Initial commit	8 lat temu
changelog	Update meta-data and templates	7 lat temu
compat	Initial commit	8 lat temu
control	Add greeter with exposed module	6 lat temu
copyright	Initial commit	8 lat temu
rules	Add greeter with exposed module	6 lat temu
saturnin-demo.install	Add greeter with exposed module	6 lat temu
shellfu-saturnin_demo.install	Add greeter with exposed module	6 lat temu