Update Readme with course overview section

Added overview section to the Readme with course details.

Signed-off-by: Fabiana  ⚡️ Campanari <113218619+FabianaCampanari@users.noreply.github.com>

Author: FabianaCampanari

Readme.md

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+## [Overview]()
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+This repository is the **main** hub for the 5th semester course “Consultoria Especializada de Apoio ao Projeto Integrado: Sistemas Distribuídos” (Distributed Systems – Specialized Consulting to Support the Integrated Project) from the Humanistic AI and Data Science program at PUC-SP, taught by Professor Carlos Eduardo Paes.[file:1]  
+Here you will find an organized view of all weekly classes, links to sub-repositories, study materials, and references that will guide you through the entire semester in a simple way, as if explaining to a child.[file:1]