Add Blazor WebApp and rework data handling to utilize Entity Framework

Core/Entities/AssignmentRequirement.cs

@@ -0,0 +1,8 @@
+namespace Core.Entities;
+
+public class AssignmentRequirement(EventDefinition eventDefinition, Student student, Requirement requirement)
+{
+	public EventDefinition EventDefinition { get; } = eventDefinition;
+	public Student Student { get; } = student;
+	public Requirement Requirement { get; } = requirement;
+}