refactor: update Role method signature and re-enable Role.cs for STJ migration

Author: reeshika-h

Contentstack.Management.Core/Models/Stack.cs

@@ -818,15 +818,13 @@ public ManagementToken ManagementTokens(string? uid = null)
         /// </code></pre>
         /// </example>
         /// <returns>The <see cref="Models.Release" /></returns>
-        /*
-        public Role Role(string uid = null)
+        public Role Role(string? uid = null)
         {
             ThrowIfNotLoggedIn();
             ThrowIfAPIKeyEmpty();
 
             return new Role(this, uid);
         }
-        */
 
         /// <summary>
         /// A <see cref="Models.Release" /> is a set of entries and assets that needs to be deployed (published or unpublished) all at once to a particular environment.

Contentstack.Management.Core/contentstack.management.core.csproj

@@ -91,7 +91,7 @@
     <!-- PublishRule.cs - RE-ENABLED for Workflow module STJ migration -->
     <!-- Release.cs - RE-ENABLED for Release module STJ migration -->
     <!-- ReleaseItem.cs - RE-ENABLED for Release module STJ migration -->
-    <Compile Remove="Models\Role.cs" />
+    <!-- Role.cs - RE-ENABLED for Role module STJ migration -->
 
 
     <!-- User.cs - RE-ENABLED -->