The __find_circular_deps() and find_circular_deps() methods now
return list[str] instead of bool. On a cycle, the path builds up the
dependency chain in __find_circular_deps_recursive(), and
__find_circular_deps() appends the closing project to complete the
cycle. An empty list means no cycle found.
CmdDep prints the cycle as 'a -> b -> c -> a' instead of a generic
message.
Assisted-by: unsloth/Qwen3.6-35B-A3B-GGUF:IQ4_NL and pi.dev
Signed-off-by: Jan Lindemann <jan@janware.com>