Create README.md for Classroom Challenge Projects

Add README.md with project descriptions and images for various classroom challenges.

Author: robertogl

Classroom Challenge Projects/Projects/README.md

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+# Classrom Challenge Projects
+
+<table>
+<tbody>
+<td><img src="https://gist.githubusercontent.com/robertogl/e0115dc303472a9cfd52bbbc8edb7665/raw/suspension.png"  width=500 /></td>
+<td><p><h2><a href="https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub/blob/main/Classroom%20Challenge%20Projects/Projects/Quarter-Car%20Suspension%20Modeling%20and%20Simulation%20with%20Simscape%20Multibody">Quarter-Car Suspension Modeling and Simulation with Simscape Multibody</a></h2></p>
+<p>Build and tune a Simscape Multibody quarter-car suspension model using an automated road test suite.</p></td>
+</tbody>  
+
+<tbody>
+<td><img src="https://gist.githubusercontent.com/robertogl/e0115dc303472a9cfd52bbbc8edb7665/raw/BatteryCharge.png"  width=500 /></td>
+<td><p><h2><a href="https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub/tree/main/Classroom%20Challenge%20Projects/Projects/Modeling%20and%20Optimizing%20a%20Battery%20Charging%20Profile">Modeling and Optimizing a Battery Charging Profile</a></h2></p>
+<p>Use MATLAB to model a lithium battery-charging profile</p></td>
+</tbody>
+
+<tbody>
+<td><img src="https://gist.githubusercontent.com/robertogl/e0115dc303472a9cfd52bbbc8edb7665/raw/SolarPanel.png"  width=500 /></td>
+<td><p><h2><a href="https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub/tree/main/Classroom%20Challenge%20Projects/Projects/Maximizing%20Solar%20Panel%20Output%20for%20a%20Fixed%20Area">Maximizing Solar Panel Output for a Fixed Area</a></h2></p>
+<p>Use MATLAB to optimize solar panel geometry to maximize solar irradiance and energy production.</p></td>
+</tbody>
+
+<tbody>
+<td><img src="https://gist.githubusercontent.com/robertogl/e0115dc303472a9cfd52bbbc8edb7665/raw/defectDetection.png"  width=500 /></td>
+<td><p><h2><a href="https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub/tree/main/Classroom%20Challenge%20Projects/Projects/Image-Based%20Defect%20Detection%20for%20Manufacturing%20Inspection">Image-Based Defect Detection for Manufacturing Inspection</a></h2></p>
+<p>Build a MATLAB inspection pipeline to detect manufacturing defects  image processing.</p></td>
+</tbody>
+
+<tbody>
+<td><img src="https://gist.githubusercontent.com/robertogl/e0115dc303472a9cfd52bbbc8edb7665/raw/QuadcopterDrone.jpg"  width=500 /></td>
+<td><p><h2><a href="https://github.com/mathworks/MATLAB-Simulink-Challenge-Project-Hub/tree/main/Classroom%20Challenge%20Projects/Projects/Drone%20Payload%20Structure%20Design%20and%20Analysis">Drone Payload Structure Design and Analysis</a></h2></p>
+<p>Design a lightweight but strong drone payload structure by applying core statics principles such as equilibrium, moments, trusses, and center‑of‑mass analysis.</p></td>
+</tbody>
+</table>
+
+
+