sys: Merge splash screen and ImHex into one application

This fixes so many issues the previous implementation had, especially on Unix

include/init/tasks.hpp

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <functional>
+#include <string>
+#include <vector>
+
+namespace hex::init {
+
+    struct Task {
+        std::string name;
+        std::function<bool()> function;
+    };
+
+    struct Argument {
+        std::string name, value;
+    };
+
+    std::vector<Task> getInitTasks();
+    std::vector<Task> getExitTasks();
+
+    std::vector<Argument>& getInitArguments();
+}