Feature/performance pdf (#426)

#  Added
- Added: Added series format information to the search typeahead to help identify duplicate series in libraries

# Fixed
- Fixed: Fixed accent color not looking well on light theme
- Fixed: Attempted to fix the memory issues with PDF reading on Docker. Uses a Memory Pool for streams and removes a bitmap operation for fixing books with transparent backgrounds (#424)

# Changed
- Changed: Refactored download logs to use the same download code as rest of Kavita 

# Dev stuff
- Added timeout for Regex's to make sure during matching, malicious filenames doesn't crash user system
- Refactored a missing GetCoverImage to use Series Format rather than old Library Type

==================================================
* Added Timeout for Regex matching to ensure malicious filenames don't crash system

* Refactored GetCoverImage to use series format rather than library type

* Refactored download logs to use the download service

* Fixed accent color not looking well on light theme

* Refactored series format into dedicated component and added to search results

* Switch to using MemoryManager for Streams to attempt to minimize GC pressure and reduced bitmap manipulation for transparency hack.

API/Services/ArchiveService.cs

@@ -387,11 +387,10 @@ namespace API.Services
             if (!archive.HasFiles() && !needsFlattening) return;
 
             archive.ExtractToDirectory(extractPath, true);
-            if (needsFlattening)
-            {
-                _logger.LogDebug("Extracted archive is nested in root folder, flattening...");
-                new DirectoryInfo(extractPath).Flatten();
-            }
+            if (!needsFlattening) return;
+
+            _logger.LogDebug("Extracted archive is nested in root folder, flattening...");
+            new DirectoryInfo(extractPath).Flatten();
         }
 
         /// <summary>