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/MaskMode.cs

@@ -0,0 +1,8 @@
+namespace Ryujinx.Horizon.Sdk.Ngc
+{
+    enum MaskMode
+    {
+        Overwrite = 0,
+        ReplaceByOneCharacter = 1,
+    }
+}