Refactor project structure and improve performance

Changed the `ProjectRepository` class to be static for easier usage.
Changed `ProjectService` constants to public properties for accessibility.
Changed `App.xaml` to consolidate theme resources into `Override.xaml`.
Changed `App.xaml.cs` to implement an `AppStateMachine` for better state management.
Changed `ConsolePage` and `HierarchyPage` to utilize the new ViewModel structure.
Changed `ProjectPage` to use the `ExplorerItem` model for asset display.
Changed `Entity` and `EntityManager` to enhance component management with a new `IComponentData` interface.
Changed the `Logger` class to introduce structured logging functionality.
Changed the system architecture to support dependency management for better organization.
Changed the `QueryEnumerable` class to allow for more flexible entity queries.
Changed the `TypeHandle` class to improve efficiency in retrieving type handles.
Changed the `World` class to support robust world management and multiple worlds.
Updated the `Test` class to demonstrate the new entity and component management system.

Ghost.Entities/Systems/SystemDependencyBuilder.cs

@@ -0,0 +1,92 @@
+using System.Reflection;
+
+namespace Ghost.Entities.Systems;
+
+internal class SystemDependencyBuilder(List<Type> allSystemTypes)
+{
+    private Dictionary<Type, List<Type>> _dependencies = new();
+
+    public void BuildDependencyGraph()
+    {
+        foreach (var systemType in allSystemTypes)
+        {
+            if (!typeof(ISystem).IsAssignableFrom(systemType) || systemType.IsAbstract || systemType.IsInterface)
+            {
+                throw new ArgumentException($"{systemType.Name} is not a concrete ISystem type.");
+            }
+
+            var directDependencies = new List<Type>();
+            var dependsOnAttributes = systemType.GetCustomAttributes<DependsOnAttribute>(false);
+            foreach (var attr in dependsOnAttributes)
+            {
+                directDependencies.AddRange(attr.Prerequisites);
+            }
+
+            _dependencies[systemType] = directDependencies;
+        }
+    }
+
+    private void Visit(Type systemType, HashSet<Type> visited, HashSet<Type> permanentMark, List<Type> executionOrder)
+    {
+        if (permanentMark.Contains(systemType))
+        {
+            return;
+        }
+
+        if (visited.Contains(systemType))
+        {
+            throw new InvalidOperationException($"Circular dependency detected involving system: {systemType.Name}");
+        }
+
+        visited.Add(systemType); // Mark as currently visiting
+
+        if (_dependencies.TryGetValue(systemType, out var directDependencies))
+        {
+            foreach (var dependencyType in directDependencies)
+            {
+                // Ensure the dependency is a registered system type
+                if (!allSystemTypes.Contains(dependencyType))
+                {
+                    throw new InvalidOperationException($"System {systemType.Name} depends on unregistered system {dependencyType.Name}.");
+                }
+
+                Visit(dependencyType, visited, permanentMark, executionOrder);
+            }
+        }
+
+        visited.Remove(systemType); // Done visiting this node in the current path
+        permanentMark.Add(systemType); // Mark as permanently processed
+        executionOrder.Add(systemType); // Add to the sorted list (this will be reversed later for correct order)
+    }
+
+    /// <summary>
+    /// Builds the topological order of systems.
+    /// </summary>
+    /// <returns>A list of system types in the order they should be executed.</returns>
+    /// <exception cref="InvalidOperationException">Thrown if a circular dependency is detected.</exception>"
+    public List<Type> BuildExecutionOrder()
+    {
+        var executionOrder = new List<Type>(allSystemTypes.Count);
+        var visited = new HashSet<Type>(); // Tracks visited nodes in the current DFS path (for cycle detection)
+        var permanentMark = new HashSet<Type>(); // Tracks nodes whose dependencies have been fully resolved
+
+        // Initialize dependencies for all registered systems, even those without explicit attributes
+        foreach (var sysType in allSystemTypes)
+        {
+            if (!_dependencies.ContainsKey(sysType))
+            {
+                _dependencies[sysType] = new();
+            }
+        }
+
+        foreach (var systemType in allSystemTypes)
+        {
+            if (!permanentMark.Contains(systemType))
+            {
+                Visit(systemType, visited, permanentMark, executionOrder);
+            }
+        }
+
+        return executionOrder;
+    }
+}