Add singleton/system manifest, process args, and async management support

Processing/ProcessManiest.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using RemSox.Processes;
+using RemSox.Processing;
+
+namespace RemSox.Processing
+{
+    public static class ProcessManifest
+    {
+        [Flags]
+        public enum ProcessManifestFlags
+        {
+            None = 0,
+            Singleton = 1 << 0,
+            System = 1 << 1
+        }
+
+        private static readonly Dictionary<Type, ProcessManifestFlags> map = new()
+        {
+            { typeof(DesktopProcess), ProcessManifestFlags.Singleton | ProcessManifestFlags.System },
+            { typeof(CliProcess), ProcessManifestFlags.Singleton | ProcessManifestFlags.System }
+        };
+
+        public static bool HasFlag<T>(ProcessManifestFlags flag) where T : Process
+        {
+            return map.TryGetValue(typeof(T), out var flags) && flags.HasFlag(flag);
+        }
+
+        public static bool HasFlag(Type t, ProcessManifestFlags flag)
+        {
+            return map.TryGetValue(t, out var flags) && flags.HasFlag(flag);
+        }
+    }
+}