Update API client with support for saving workflow definitions

src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Contracts/IWorkflowDefinitionsApi.cs

@@ -30,6 +30,15 @@ public interface IWorkflowDefinitionsApi
     [Get("/workflow-definitions/{definitionId}?versionOptions={VersionOptions}&includeCompositeRoot={includeCompositeRoot}")]
     Task<WorkflowDefinition?> GetAsync(string definitionId, VersionOptions? versionOptions = default, bool includeCompositeRoot = false, CancellationToken cancellationToken = default);
 
+    /// <summary>
+    /// Saves a workflow definition.
+    /// </summary>
+    /// <param name="request">The request containing the workflow definition to save.</param>
+    /// <param name="cancellationToken">The cancellation token.</param>
+    /// <returns>The workflow definition.</returns>
+    [Post("/workflow-definitions")]
+    Task<WorkflowDefinition> SaveAsync(SaveWorkflowDefinitionRequest request, CancellationToken cancellationToken = default);
+    
     /// <summary>
     /// Deletes a workflow definition.
     /// </summary>

src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/SaveWorkflowDefinitionRequest.cs

@@ -0,0 +1,18 @@
+namespace Elsa.Api.Client.Resources.WorkflowDefinitions.Models
+{
+    /// <summary>
+    /// Represents a request to save a workflow definition.
+    /// </summary>
+    public class SaveWorkflowDefinitionRequest
+    {
+        /// <summary>
+        /// The workflow definition to save.
+        /// </summary>
+        public WorkflowDefinitionModel Model { get; set; } = default!;
+
+        /// <summary>
+        /// Whether the workflow definition should be published.
+        /// </summary>
+        public bool? Publish { get; set; }
+    }
+}

src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/VariableDefinition.cs

@@ -0,0 +1,14 @@
+namespace Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
+
+/// <summary>
+/// Stores information about a workflow variable.
+/// </summary>
+public class VariableDefinition
+{
+    public string Id { get; set; }
+    public string Name { get; set; }
+    public string TypeName { get; set; }
+    public bool IsArray { get; set; }
+    public string? Value { get; set; }
+    public string? StorageDriverTypeName { get; set; }
+}

src/clients/Elsa.Api.Client/Resources/WorkflowDefinitions/Models/WorkflowDefinitionModel.cs

@@ -0,0 +1,65 @@
+using System.Text.Json;
+using JetBrains.Annotations;
+
+namespace Elsa.Api.Client.Resources.WorkflowDefinitions.Models;
+
+/// <summary>
+/// Represents a serializable workflow definition.
+/// </summary>
+/// <param name="Id"></param>
+/// <param name="DefinitionId"></param>
+/// <param name="Name"></param>
+/// <param name="Description"></param>
+/// <param name="CreatedAt"></param>
+/// <param name="Version"></param>
+/// <param name="Variables"></param>
+/// <param name="Inputs"></param>
+/// <param name="Outputs"></param>
+/// <param name="Outcomes"></param>
+/// <param name="CustomProperties"></param>
+/// <param name="IsReadonly"></param>
+/// <param name="IsLatest"></param>
+/// <param name="IsPublished"></param>
+/// <param name="Options">The type of <c>IWorkflowActivationStrategy</c> to apply when new instances are requested to be created.</param>
+/// <param name="Root"></param>
+[PublicAPI]
+public record WorkflowDefinitionModel(
+    string Id,
+    string DefinitionId,
+    string? Name,
+    string? Description,
+    DateTimeOffset CreatedAt,
+    int Version,
+    ICollection<VariableDefinition>? Variables,
+    ICollection<InputDefinition>? Inputs,
+    ICollection<OutputDefinition>? Outputs,
+    ICollection<string>? Outcomes,
+    IDictionary<string, object>? CustomProperties,
+    bool IsReadonly,
+    bool IsLatest,
+    bool IsPublished,
+    WorkflowOptions? Options,
+    JsonElement? Root
+)
+{
+    /// <inheritdoc />
+    public WorkflowDefinitionModel() : this(
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!,
+        default!)
+    {
+    }
+}