misc: chore: VP9 project cleanup

Target-typed new, remove var usage, use collection expressions, rename many fields & properties to match C# standard

src/Ryujinx.Graphics.Nvdec.Vp9/Decoder.cs

@@ -17,10 +17,10 @@ namespace Ryujinx.Graphics.Nvdec.Vp9
             return new Surface(width, height);
         }
 
-        private static ReadOnlySpan<byte> LiteralToFilter => new byte[]
-        {
+        private static ReadOnlySpan<byte> LiteralToFilter =>
+        [
             Constants.EightTapSmooth, Constants.EightTap, Constants.EightTapSharp, Constants.Bilinear
-        };
+        ];
 
         public unsafe bool Decode(
             ref Vp9PictureInfo pictureInfo,