Update SUMMARY.md, pages/Courses.md, pages/Detector.md, pages/UseCases.md,...

Update SUMMARY.md, pages/Courses.md, pages/Detector.md, pages/UseCases.md, pages/Astrophysics.md, pages/SeaScience.md, pages/Neutrinophysics.md files

SUMMARY.md

 # Table of Contents
 
 ## Introduction
-* FAIR principles @KM3NeT
-* The Open Data System
+* [FAIR principles @KM3NeT](pages/FAIR.md)
+* [The Open Data System](pages/infrastructure.md)
 * Quickstart to KM3NeT data
 * Tutorials and examples
-  * Courses and Webinars
-  * Science use cases
+  * [Courses and Webinars](pages/Courses.md)
+  * [Science use cases](pages/UseCases.md)
 
 ## Open Data
 * KM3NeT data generation
-  * detector and data taking
+  * [Detector and data taking](pages/Detector.md)
   * data processing
 * Fields of science
-  * Astrophysics
-  * Neutrino Physics
-  * Sea Science
+  * [Astrophysics](pages/Astrophysics.md)
+  * [Neutrino Physics](pages/Neutrinophysics.md)
+  * [Sea Science](pages/SeaScience.md)
 * Accessing data
   * KM3NeT Data Center
   * Virtual Observatory

pages/Astrophysics.md

+description - relevant data - linked use cases & data
+
+Thanks Jannik!

pages/Courses.md

+# Courses and Webinars
+
+Please add links and summary to open courses in edu portal
+
+## Webinar
+perhaps add short description of the open workshop
++ a short description how to give the same workshop
+
+thanks Dimitris!

pages/Detector.md

+What data does KM3NeT take, how does it work?
+
+Thanks Jannik!

pages/Neutrinophysics.md

+description - relevant data - linked use cases & data
+
+Thanks Jannik!

pages/SeaScience.md

+description - relevant data - linked use cases & data
+
+Thanks Jannik!