feat: WIP connections query endpoint

Validators/QueryPuzzlesRequestValidator.cs

@@ -0,0 +1,19 @@
+using System;
+using ConnectionsAPI.Models.Request;
+using FluentValidation;
+
+namespace ConnectionsAPI.Validators;
+
+public class QueryPuzzlesRequestValidator : Validator<QueryPuzzlesRequest>
+{
+  public QueryPuzzlesRequestValidator()
+  {
+    RuleFor(x => x.Page)
+      .Must(x => x > 0)
+        .WithMessage("Page number must be a positive integer");
+
+    RuleFor(x => x.Count)
+      .Must(x => x > 0)
+        .WithMessage(x => "Item count must be a positive integer");
+  }
+}