DragonOS-Community/printf-compat: printf impl in Rust

kopia lustrzana https://github.com/DragonOS-Community/printf-compat

JC 194a832ab6 Add minimal executable to ensure lib is no-std and no-alloc		2 lat temu
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ensure_no_std	194a832ab6 Add minimal executable to ensure lib is no-std and no-alloc	1 miesiąc temu