Implemented crude support for custom encodings via thingy files

Relevant issue: #26

include/views/view_hexeditor.hpp

@@ -2,6 +2,7 @@
 
 #include <hex/helpers/utils.hpp>
 #include <hex/views/view.hpp>
+#include "helpers/encoding_file.hpp"
 
 #include <imgui_memory_editor.h>
 #include <ImGuiFileBrowser.h>
@@ -54,6 +55,8 @@ namespace hex {
         std::string m_loaderScriptScriptPath;
         std::string m_loaderScriptFilePath;
 
+        hex::EncodingFile m_currEncodingFile;
+
         void drawSearchPopup();
         void drawGotoPopup();
         void drawEditPopup();