Add ModelContextProtocol.Core package (#428)

src/ModelContextProtocol/Protocol/PromptArgument.cs

@@ -1,45 +0,0 @@
-using System.Text.Json.Serialization;
-
-namespace ModelContextProtocol.Protocol;
-
-/// <summary>
-/// Represents an argument that a prompt can accept for templating and customization.
-/// </summary>
-/// <remarks>
-/// <para>
-/// The <see cref="PromptArgument"/> class defines metadata for arguments that can be provided
-/// to a prompt. These arguments are used to customize or parameterize prompts when they are 
-/// retrieved using <see cref="RequestMethods.PromptsGet"/> requests.
-/// </para>
-/// <para>
-/// See the <see href="https://github.com/modelcontextprotocol/specification/blob/main/schema/">schema</see> for details.
-/// </para>
-/// </remarks>
-public class PromptArgument
-{
-    /// <summary>
-    /// Gets or sets the name of the argument used for referencing in prompt templates.
-    /// </summary>
-    [JsonPropertyName("name")]
-    public string Name { get; set; } = string.Empty;
-
-    /// <summary>
-    /// Gets or sets a human-readable description of the argument's purpose and expected values.
-    /// </summary>
-    /// <remarks>
-    /// This description helps developers understand what information should be provided
-    /// for this argument and how it will affect the generated prompt.
-    /// </remarks>
-    [JsonPropertyName("description")]
-    public string? Description { get; set; } = string.Empty;
-
-    /// <summary>
-    /// Gets or sets an indication as to whether this argument must be provided when requesting the prompt.
-    /// </summary>
-    /// <remarks>
-    /// When set to <see langword="true"/>, the client must include this argument when making a <see cref="RequestMethods.PromptsGet"/> request.
-    /// If a required argument is missing, the server should respond with an error.
-    /// </remarks>
-    [JsonPropertyName("required")]
-    public bool? Required { get; set; }
-}