chore: Added Initial Engine Code

Engine.Core/Abstract/Assignable/IAssignable.cs

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+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the class implementing it has Assignable fields that are necessary for the engine to work properly.
+/// </summary>
+public interface IAssignable { }

Engine.Core/Abstract/Assignable/IAssignableBehaviourController.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IBehaviourController"/> field.
+/// </summary>
+public interface IAssignableBehaviourController : IAssignable
+{
+    /// <summary>
+    /// Callback triggered when the <see cref="IBehaviourController"/> value has has been assigned a new value.
+    /// </summary>
+    Action<IAssignableBehaviourController>? OnBehaviourControllerAssigned { get; set; }
+
+    /// <inheritdoc cref="IBehaviourController" />
+    IBehaviourController BehaviourController { get; }
+
+    /// <summary>
+    /// Assign a value to the <see cref="IBehaviourController"/> field of this object
+    /// </summary>
+    /// <param name="behaviourController">New <see cref="IBehaviourController"/> to assign.</param>
+    /// <returns> 
+    /// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
+    /// </returns>
+    bool Assign(IBehaviourController behaviourController);
+}

Engine.Core/Abstract/Assignable/IAssignableEntity.cs

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+using System;
+
+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IEntity"/> field.
+/// </summary>
+public interface IAssignableEntity : IAssignable
+{
+    /// <summary>
+    /// Callback triggered when the <see cref="IEntity"/> value has has been assigned a new value.
+    /// </summary>
+    Action<IAssignableEntity>? OnEntityAssigned { get; set; }
+
+    /// <inheritdoc cref="IEntity" />
+    IEntity Entity { get; }
+
+    /// <summary>
+    /// Assign a value to the <see cref="IEntity"/> field of this object
+    /// </summary>
+    /// <param name="entity">New <see cref="IEntity"/> to assign.</param>
+    /// <returns> 
+    /// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
+    /// </returns>
+    bool Assign(IEntity entity);
+}

Engine.Core/Abstract/Assignable/IAssignableGameObject.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IGameObject"/> field.
+/// </summary>
+public interface IAssignableGameObject : IAssignable
+{
+    /// <summary>
+    /// Callback triggered when the <see cref="IGameObject"/> value has has been assigned a new value.
+    /// </summary>
+    Action<IAssignableGameObject>? OnGameObjectAssigned { get; set; }
+
+    /// <inheritdoc cref="IGameObject" />
+    IGameObject GameObject { get; }
+
+    /// <summary>
+    /// Assign a value to the <see cref="IGameObject"/> field of this object
+    /// </summary>
+    /// <param name="gameObject">New <see cref="IGameObject"/> to assign.</param>
+    /// <returns> 
+    /// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
+    /// </returns>
+    bool Assign(IGameObject gameObject);
+}

Engine.Core/Abstract/Assignable/IAssignableSprite.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="ISprite"/> field.
+/// </summary>
+public interface IAssignableSprite : IAssignable
+{
+    /// <summary>
+    /// Callback triggered when the <see cref="ISprite"/> value has has been assigned a new value.
+    /// </summary>
+    Action<IAssignableSprite>? OnSpriteAssigned { get; set; }
+
+    /// <inheritdoc cref="ISprite" />
+    ISprite Sprite { get; }
+
+    /// <summary>
+    /// Assign a value to the <see cref="ISprite"/> field of this object
+    /// </summary>
+    /// <param name="sprite">New <see cref="ISprite"/> to assign.</param>
+    /// <returns> 
+    /// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
+    /// </returns>
+    bool Assign(ISprite sprite);
+}

Engine.Core/Abstract/Assignable/IAssignableStateEnable.cs

@@ -0,0 +1,26 @@
+using System;
+
+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="IStateEnable"/> field.
+/// </summary>
+public interface IAssignableStateEnable : IAssignable
+{
+    /// <summary>
+    /// Callback triggered when the <see cref="IStateEnable"/> value has has been assigned a new value.
+    /// </summary>
+    Action<IAssignableStateEnable>? OnStateEnableAssigned { get; set; }
+
+    /// <inheritdoc cref="IStateEnable" />
+    IStateEnable StateEnable { get; }
+
+    /// <summary>
+    /// Assign a value to the <see cref="IStateEnable"/> field of this object
+    /// </summary>
+    /// <param name="stateEnable">New <see cref="IStateEnable"/> to assign.</param>
+    /// <returns> 
+    /// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
+    /// </returns>
+    bool Assign(IStateEnable stateEnable);
+}

Engine.Core/Abstract/Assignable/IAssignableTransform.cs

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+using System;
+
+namespace Syntriax.Engine.Core.Abstract;
+
+/// <summary>
+/// Indicates the object is an <see cref="IAssignable"/> with an assignable <see cref="ITransform"/> field.
+/// </summary>
+public interface IAssignableTransform : IAssignable
+{
+    /// <summary>
+    /// Callback triggered when the <see cref="ITransform"/> value has has been assigned a new value.
+    /// </summary>
+    Action<IAssignableTransform>? OnTransformAssigned { get; set; }
+
+    /// <inheritdoc cref="ITransform" />
+    ITransform Transform { get; }
+
+    /// <summary>
+    /// Assign a value to the <see cref="ITransform"/> field of this object
+    /// </summary>
+    /// <param name="transform">New <see cref="ITransform"/> to assign.</param>
+    /// <returns> 
+    /// <see cref="true"/>, if the value given assigned successfully assigned, <see cref="false"/> if not.
+    /// </returns>
+    bool Assign(ITransform transform);
+}