feat: Adds some documentation strings in ManualDCore module.

Sources/ManualDCore/Extensions/PageRequest+extensions.swift

@@ -0,0 +1,12 @@
+import Fluent
+
+extension PageRequest {
+
+  public static var first: Self {
+    .init(page: 1, per: 25)
+  }
+
+  public static func next<T>(_ currentPage: Page<T>) -> Self {
+    .init(page: currentPage.metadata.page + 1, per: currentPage.metadata.per)
+  }
+}