Refactor HtmlHelper, update PagedListRenderOptions, _PostList

Refactored HtmlHelper to use a local function named `Format` for
generating page URLs, improving readability and maintainability.

Removed the `FunctionToDisplayEachPageNumber` property from
PagedListRenderOptions, simplifying the class by eliminating an
unused feature.

Updated `_PostList.cshtml` to use a more modern and concise
syntax for initializing the `UlElementClasses` array in the
`PagedListPager` method.

src/Moonglade.Web/PagedList/HtmlHelper.cs

@@ -91,14 +91,13 @@ private TagBuilder Previous(IPagedList list, Func<int, string> generatePageUrl,
 
     private TagBuilder Page(int i, IPagedList list, Func<int, string> generatePageUrl, PagedListRenderOptions options)
     {
-        var format = options.FunctionToDisplayEachPageNumber
-                     ?? (pageNumber => string.Format(options.LinkToIndividualPageFormat, pageNumber));
+        string Format(int pageNumber) => string.Format(options.LinkToIndividualPageFormat, pageNumber);
         var targetPageNumber = i;
         var page = i == list.PageNumber
             ? new TagBuilder("span")
             : new TagBuilder("a");
 
-        SetInnerText(page, format(targetPageNumber));
+        SetInnerText(page, Format(targetPageNumber));
 
         foreach (var c in options.PageClasses ?? [])
         {

src/Moonglade.Web/PagedList/PagedListRenderOptions.cs

@@ -16,7 +16,6 @@ public PagedListRenderOptions()
         LinkToLastPageFormat = ">>";
         PageCountAndCurrentLocationFormat = "Page {0} of {1}.";
         ItemSliceAndTotalFormat = "Showing items {0} through {1} of {2}.";
-        FunctionToDisplayEachPageNumber = null;
         UlElementClasses = ["pagination"];
         PageClasses = ["page-link"];
         PreviousElementClass = "PagedList-skip-to-previous";
@@ -111,9 +110,4 @@ public PagedListRenderOptions()
     /// "Showing items {0} through {1} of {2}."
     ///</example>
     public string ItemSliceAndTotalFormat { get; set; }
-
-    /// <summary>
-    /// A function that will render each page number when specified (and DisplayLinkToIndividualPages is true). If no function is specified, the LinkToIndividualPageFormat value will be used instead.
-    /// </summary>
-    public Func<int, string> FunctionToDisplayEachPageNumber { get; set; }
 }

src/Moonglade.Web/Pages/Shared/_PostList.cshtml

@@ -6,8 +6,9 @@
     <partial name="_PostListEntry" model="item" />
 }
 
+
 @Html.PagedListPager(Model, page => $"?p={page}", new()
 {
-    UlElementClasses = new[] { "pagination justify-content-end" },
+    UlElementClasses = ["pagination justify-content-end"],
     MaximumPageNumbersToDisplay = 5
 })