- Add Localization.h/cpp with singleton pattern for translation management
- Add translation keys to en_US.json and es_ES.json for UI elements
- Update C++ files to use LUS_LOC() macro instead of hardcoded strings:
* InputEditorWindow.cpp - Button and input mapping texts
* ConsoleWindow.cpp - Clear button functionality
* GfxDebuggerWindow.cpp - Debug and texture loading texts
- Initialize language loading in OTRGlobals.cpp based on settings
- Support both English (en_US) and Spanish (es_ES) languages
- All translations loaded from JSON files, no hardcoded text in C++
This implements the requested translation system following the existing pattern
used throughout the codebase.
