Add SQL query patterns documentation and Linux package build scripts

- Created `TV_SHOWS_SQL_QUERY_PATTERNS.md` to document SQL query patterns for TV shows, including performance issues and missing indexes.
- Added `README.md` for Linux package building, detailing steps for creating Debian and Red Hat packages.
- Implemented build scripts for Debian and Red Hat, including service files and post-installation hooks.
- Added necessary scripts for managing Jellyfin service lifecycle on both Debian and Red Hat systems.
- Included package specifications and installation instructions for both distributions.

Emby.Server.Implementations/Library/LibraryManager.cs

@@ -1286,6 +1286,7 @@ namespace Emby.Server.Implementations.Library
             var refreshQueue = includeRefreshState ? ProviderManager.GetRefreshQueue() : null;
 
             return _fileSystem.GetDirectoryPaths(_configurationManager.ApplicationPaths.DefaultUserViewsPath)
+                .Order()
                 .Select(dir => GetVirtualFolderInfo(dir, topLibraryFolders, refreshQueue))
                 .ToList();
         }
@@ -1475,6 +1476,25 @@ namespace Emby.Server.Implementations.Library
             return _itemRepository.GetItemCounts(query);
         }
 
+        public async Task<ItemCounts> GetItemCountsAsync(InternalItemsQuery query, CancellationToken cancellationToken = default)
+        {
+            if (query.Recursive && !query.ParentId.IsEmpty())
+            {
+                var parent = GetItemById(query.ParentId);
+                if (parent is not null)
+                {
+                    SetTopParentIdsOrAncestors(query, [parent]);
+                }
+            }
+
+            if (query.User is not null)
+            {
+                AddUserToQuery(query, query.User);
+            }
+
+            return await _itemRepository.GetItemCountsAsync(query, cancellationToken).ConfigureAwait(false);
+        }
+
         public IReadOnlyList<BaseItem> GetItemList(InternalItemsQuery query, List<BaseItem> parents)
         {
             SetTopParentIdsOrAncestors(query, parents);