seperate redux ui impl into FrontendCore project

Il2CppInspector.Redux.FrontendCore/Outputs/OutputFormatRegistry.cs

@@ -0,0 +1,38 @@
+namespace Il2CppInspector.Redux.FrontendCore.Outputs;
+
+public static class OutputFormatRegistry
+{
+    public static IEnumerable<string> AvailableOutputFormats => OutputFormats.Keys;
+
+    private static readonly Dictionary<string, IOutputFormat> OutputFormats = [];
+
+    public static void RegisterOutputFormat<T>() where T : IOutputFormatProvider, new()
+    {
+        if (OutputFormats.ContainsKey(T.Id))
+            throw new InvalidOperationException("An output format with this id was already registered.");
+
+        OutputFormats[T.Id] = new T();
+    }
+
+    public static IOutputFormat GetOutputFormat(string id)
+    {
+        if (!OutputFormats.TryGetValue(id, out var format))
+            throw new ArgumentException($"Failed to find output format for id {id}", nameof(id));
+
+        return format;
+    }
+
+    private static void RegisterBuiltinOutputFormats()
+    {
+        RegisterOutputFormat<CSharpStubOutput>();
+        RegisterOutputFormat<VsSolutionOutput>();
+        RegisterOutputFormat<DummyDllOutput>();
+        RegisterOutputFormat<DisassemblerMetadataOutput>();
+        RegisterOutputFormat<CppScaffoldingOutput>();
+    }
+
+    static OutputFormatRegistry()
+    {
+        RegisterBuiltinOutputFormats();
+    }
+}