Implement NGC service (#5681)

* Implement NGC service

* Use raw byte arrays instead of string for _wordSeparators

* Silence IDE0230 for _wordSeparators

* Try to silence warning about _rangeValuesCount not being read on SparseSet

* Make AcType enum private

* Add abstract methods and one TODO that I forgot

* PR feedback

* More PR feedback

* More PR feedback

src/Ryujinx.Horizon/Sdk/Ngc/INgcService.cs

@@ -0,0 +1,14 @@
+using Ryujinx.Horizon.Common;
+using Ryujinx.Horizon.Sdk.Sf;
+using System;
+
+namespace Ryujinx.Horizon.Sdk.Ngc
+{
+    interface INgcService : IServiceObject
+    {
+        Result GetContentVersion(out uint version);
+        Result Check(out uint checkMask, ReadOnlySpan<byte> text, uint regionMask, ProfanityFilterOption option);
+        Result Mask(out int maskedWordsCount, Span<byte> filteredText, ReadOnlySpan<byte> text, uint regionMask, ProfanityFilterOption option);
+        Result Reload();
+    }
+}