ultra-short, illustrative story for patterns

Story provides a more narrative, less academic description to a pattern. When a pattern has a good narrative description at the first few sections, it helps people deciding quickly whether this is something they want to dive deeper. Some patterns provide good narrative while some other patterns lack those narrative angle. It would help to add story or improve narrative description to the patterns that don't have good narratives.

Nenhum arquivo ou teste é mencionado na issue. Revise os documentos de patterns do repositório e identifique as entradas cujas seções iniciais não têm uma narrativa concisa; considera-se concluído quando os patterns selecionados têm histórias úteis que ajudam os leitores a decidir se querem continuar explorando.