Add project files.

Core.Blueprint.Mongo/Attributes/CollectionAttributeName.cs

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+namespace Core.Blueprint.Mongo
+{
+    /// <summary>
+    /// The <see cref="CollectionAttributeName"/> attribute is used to specify the name of a MongoDB collection 
+    /// that a class should be mapped to. This attribute can be applied to classes that represent MongoDB entities.
+    /// </summary>
+    [AttributeUsage(AttributeTargets.Class)]  // This attribute can only be applied to classes.
+    public class CollectionAttributeName : Attribute
+    {
+        /// <summary>
+        /// Gets or sets the name of the MongoDB collection that the class is mapped to.
+        /// </summary>
+        public string Name { get; set; }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="CollectionAttributeName"/> class with the specified collection name.
+        /// </summary>
+        /// <param name="name">The name of the MongoDB collection that the class should be mapped to.</param>
+        public CollectionAttributeName(string name)
+        {
+            Name = name ?? throw new ArgumentNullException(nameof(name), "Collection name cannot be null.");
+        }
+    }
+}