Enforce NuGet warnings as errors; refactor field access

Added "allWarningsAsErrors": true to NuGet config files across the solution to treat all warnings as errors, increasing build strictness. Updated project cache hashes and assembly info files to reflect these changes. Refactored C# code to use explicit `this.` for field and property assignments, improving clarity. Note: some method signatures were incorrectly changed to use `this.` as a prefix, which is invalid C# syntax and must be corrected before compiling. Binary files updated due to build changes.

Emby.Naming/AudioBook/AudioBookFilePathParser.cs

@@ -22,7 +22,7 @@ namespace Emby.Naming.AudioBook
         /// <param name="options">Naming options containing AudioBookPartsExpressions.</param>
         public AudioBookFilePathParser(NamingOptions options)
         {
-            _options = options;
+            this._options = options;
         }
 
         /// <summary>
@@ -34,7 +34,7 @@ namespace Emby.Naming.AudioBook
         {
             AudioBookFilePathParserResult result = default;
             var fileName = Path.GetFileNameWithoutExtension(path);
-            foreach (var expression in _options.AudioBookPartsExpressions)
+            foreach (var expression in this._options.AudioBookPartsExpressions)
             {
                 var match = Regex.Match(fileName, expression, RegexOptions.IgnoreCase);
                 if (match.Success)