Stackby: exercicios: map filter sort

adicionar os conteúdos de map, filter e sort no stackby, seguindo os docs de melhora dos enunciados e separação dos exercícios, ja colocar os de autoestudo e nivelamento em seus respectivos lugares respeitando as padronizações do stackby

[repositorio com os enunciados ja existentes](https://github.com/aceleradora-TW/exercicios-map-filter-sort-26)
[doc de melhora dos enunciados](https://docs.google.com/document/d/133X6MqNNdLDwN1o8pbzyPLAk3iJIQYwqUmq6bi2tc78/edit?tab=t.0)
[doc de separação autoestudo/nivelmento](https://docs.google.com/document/d/1xgXrxg6wpW4uIAUx5BB7fvYTxQtOxhMQI8o3PDyQmO8/edit?tab=t.0)
[Doc de padronização Stackby](https://docs.google.com/document/d/1l0fgAxKembeCJSwCsFRlI_SV7OebHb96Rqlm2DR3Usg/edit?tab=t.0#heading=h.ixklttwadv8c)

https://github.com/GabrielleGobbi/exercicios-map-filter-sort-26

Start by reviewing the existing exercises in the linked exercicios-map-filter-sort-26 repository and then read the three Google Docs on improving statements, separating self-study and leveling exercises, and Stackby standards. Done means the map, filter, and sort content is added to Stackby, placed in the appropriate categories, and follows the stated standardization.

Scritto dal modello di indicizzazione a partire dal testo della issue.