LibUnicode: Add some data related to currency codes

This data is published under ISO-4217 as an XML file. Since we can't
parse XML files yet, and the data isn't very large, it was translated to
C++ manually here.

Userland/Libraries/LibUnicode/CMakeLists.txt

@@ -3,6 +3,7 @@ include(${SerenityOS_SOURCE_DIR}/Meta/CMake/unicode_data.cmake)
 SET(SOURCES
     ${UNICODE_DATA_SOURCES}
     CharacterTypes.cpp
+    CurrencyCode.cpp
     Locale.cpp
 )