Add CLI process and GUI start/stop commands with process management

Processes/CliProcess.cs

@@ -0,0 +1,33 @@
+using RemSox.Processing;
+using RemSox.UI.CLI;
+
+namespace RemSox.Processes;
+
+internal class CliProcess() : Process("Cli")
+{
+    internal override void Run(string[] args)
+    {
+        Console.Clear();
+        Console.WriteLine("Welcome RemSox!");
+        Console.WriteLine("Type 'help' to see available commands.");
+
+        while (!StopRequested)
+        {
+            Console.Write("> ");
+
+            string? input = Console.ReadLine();
+
+            if (string.IsNullOrWhiteSpace(input))
+            {
+                continue;
+            }
+
+            bool handled = CommandManager.TryExecute(input, line => Console.WriteLine(line));
+
+            if (!handled)
+            {
+                Console.WriteLine($"\"{input}\" is not a command");
+            }
+        }
+    }
+}