Some additions to ReflectionCache source generator

ExternalProjects/BizHawk.SrcGen.ReflectionCache/ReflectionCacheGenerator.cs

@@ -64,15 +64,19 @@ namespace BizHawk.SrcGen.ReflectionCache
 			var src = $@"#nullable enable
 
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 using System.Reflection;
 {(nSpace == "BizHawk.Common" ? string.Empty : "\nusing BizHawk.Common;")}
+using BizHawk.Common.StringExtensions;
 
 namespace {nSpace}
 {{
 	public static class ReflectionCache
 	{{
+		private const string EMBED_PREFIX = ""{nSpace}."";
+
 		private static Type[]? _types = null;
 
 		private static readonly Assembly Asm = typeof({nSpace}.ReflectionCache).Assembly;
@@ -81,11 +85,19 @@ namespace {nSpace}
 
 		public static Type[] Types => _types ??= Asm.GetTypesWithoutLoadErrors().ToArray();
 
+		public static IEnumerable<string> EmbeddedResourceList(string extraPrefix)
+		{{
+			var fullPrefix = EMBED_PREFIX + extraPrefix;
+			return Asm.GetManifestResourceNames().Where(s => s.StartsWith(fullPrefix)).Select(s => s.RemovePrefix(fullPrefix));
+		}}
+
+		public static IEnumerable<string> EmbeddedResourceList()
+			=> EmbeddedResourceList(string.Empty);
 
 		/// <exception cref=""ArgumentException"">not found</exception>
 		public static Stream EmbeddedResourceStream(string embedPath)
 		{{
-			var fullPath = $""{nSpace}.{{embedPath}}"";
+			var fullPath = EMBED_PREFIX + embedPath;
 			return Asm.GetManifestResourceStream(fullPath) ?? throw new ArgumentException($""resource at {{fullPath}} not found"", nameof(embedPath));
 		}}
 	}}