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/Detail/MatchRangeListState.cs

@@ -0,0 +1,21 @@
+using System;
+
+namespace Ryujinx.Horizon.Sdk.Ngc.Detail
+{
+    struct MatchRangeListState
+    {
+        public MatchRangeList MatchRanges;
+
+        public MatchRangeListState()
+        {
+            MatchRanges = new();
+        }
+
+        public static bool AddMatch(ReadOnlySpan<byte> text, int startOffset, int endOffset, int nodeId, ref MatchRangeListState state)
+        {
+            state.MatchRanges.Add(startOffset, endOffset);
+
+            return true;
+        }
+    }
+}