Use CLI11 instead of clipp for command line parsing.

.gitmodules

@@ -13,6 +13,6 @@
 	path = include/lol/3rdparty/portable-file-dialogs
 	url = ../../samhocevar/portable-file-dialogs.git
 	branch = master
-[submodule "clipp"]
-	path = include/lol/3rdparty/clipp
-	url = ../../muellan/clipp.git
+[submodule "cli11"]
+	path = include/lol/3rdparty/cli11
+	url = ../../lolengine/ext-cli11.git

include/lol/3rdparty/cli11

@@ -0,0 +1 @@
+Subproject commit 5b2c30b5d577056039bcccfea7156b35f244621c

include/lol/3rdparty/clipp

@@ -1 +0,0 @@
-Subproject commit 2c32b2f1f7cc530b1ec1f62c92f698643bb368db

include/lol/cli

@@ -13,12 +13,20 @@
 #pragma once
 
 #include "private/push_macros.h"
-#include "3rdparty/clipp/include/clipp.h"
+#include "3rdparty/cli11/include/CLI/CLI.hpp"
 #include "private/pop_macros.h"
 
+namespace CLI
+{
+
+using app = App;
+
+};
+
 namespace lol
 {
 
-namespace cli = clipp;
+namespace cli = CLI;
 
 };
+