chore: import Musify.WebApi into monorepo (preserving history)

git-subtree-dir: Musify.WebApi
git-subtree-mainline: 9d433868cc
git-subtree-split: ca8750c3b4

Musify.WebApi/WebApi/Validators/PlayLists/UpdatePlayListRequestValidator.cs

@@ -0,0 +1,18 @@
+using FluentValidation;
+using WebApi.DataTransferObjects.PlayLists;
+
+namespace WebApi.Validators.PlayLists;
+
+public sealed class UpdatePlayListRequestValidator : AbstractValidator<UpdatePlayListRequest>
+{
+    public UpdatePlayListRequestValidator()
+    {
+        RuleFor(x => x.NewName)
+            .MaximumLength(50)
+            .When(x => x.NewName is not null);
+
+        RuleFor(x => x.NewDescription)
+            .MaximumLength(256)
+            .When(x => x.NewDescription is not null);
+    }
+}