Add project files.

Core.Blueprint.Mongo/Contracts/IMongoDbSettings.cs

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+namespace Core.Blueprint.Mongo
+{
+    /// <summary>
+    /// Represents the settings required to connect to a MongoDB instance, including the connection string, 
+    /// database name, and audience used for authentication.
+    /// </summary>
+    public interface IMongoDbSettings
+    {
+        /// <summary>
+        /// Gets or sets the connection string used to connect to the MongoDB instance.
+        /// The connection string includes details such as server address, port, 
+        /// authentication credentials, and any additional options needed for connection.
+        /// </summary>
+        /// <value>A string representing the MongoDB connection string.</value>
+        string ConnectionString { get; set; }
+
+        /// <summary>
+        /// Gets or sets the name of the MongoDB database to connect to.
+        /// This value specifies which database to use within the MongoDB instance.
+        /// </summary>
+        /// <value>A string representing the name of the MongoDB database.</value>
+        string Databasename { get; set; }
+
+        /// <summary>
+        /// Gets or sets the audience (resource identifier) for MongoDB authentication.
+        /// This is typically used in token-based authentication schemes (e.g., OAuth or OpenID Connect),
+        /// to specify the intended recipient of an access token.
+        /// </summary>
+        /// <value>A string representing the MongoDB audience (resource identifier for authentication).</value>
+        string Audience { get; set; }
+    }
+}