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Summary
Adds the empty struct idiom to the idioms section.
The empty struct (
struct{}) is a well-known Go idiom widely used in the community, but it hasn't been documented in this repository yet.This PR adds
idiom/empty-struct.mdwith some common use cases.Changes
idiom/empty-struct.mdwith implementation and usage examplesREADME.mdto include the new pattern in the Idioms table