Document official extension project and stages

Added details about the official extension project and its stages.

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

Author: FabianaCampanari

README.md

@@ -221,11 +221,22 @@ By the end of the course, students should be able to:
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+## [Official Extension Project (Project Integrator 1 – 2 Subprojects)]()
 
 
 
+The **official extension project** of this course is **Project Integrator 1 (March–April)** described in the briefing **“Análise de Dados para conhecimento e predição a partir de webservice”**.[file:2]  
+It is composed of **two subprojects (two stages)** that together satisfy the extension requirements.
 
+### Stage 1 – Consuming Third‑Party APIs, Dashboards and Prediction
 
+**Theme:** “Consuming APIs for data analysis” – using Web Services for **knowledge and prediction** based on remote data  
+
+The group selects a market or social domain and develops the following steps:
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