🇪🇪 ET Translation patch (#7479)

- First iteration of Estonian translations
- Added to Eesti to Options as well as included the strings to the Asset file.

CMake/Assets.cmake

@@ -2,7 +2,7 @@ if(NOT DEFINED DEVILUTIONX_ASSETS_OUTPUT_DIRECTORY)
   set(DEVILUTIONX_ASSETS_OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/assets")
 endif()
 
-set(devilutionx_langs bg cs da de el es fr hr hu it ja ko pl pt_BR ro ru uk sv tr zh_CN zh_TW)
+set(devilutionx_langs bg cs da de el es et fr hr hu it ja ko pl pt_BR ro ru uk sv tr zh_CN zh_TW)
 if(USE_GETTEXT_FROM_VCPKG)
   # vcpkg doesn't add its own tools directory to the search path
   list(APPEND Gettext_ROOT ${CMAKE_CURRENT_BINARY_DIR}/vcpkg_installed/${VCPKG_TARGET_TRIPLET}/tools/gettext/bin)

Source/options.cpp

@@ -1221,6 +1221,7 @@ void OptionEntryLanguageCode::CheckLanguagesAreInitialized() const
 	languages.emplace_back("el", "Ελληνικά");
 	languages.emplace_back("en", "English");
 	languages.emplace_back("es", "Español");
+	languages.emplace_back("et", "Eesti");
 	languages.emplace_back("fr", "Français");
 	languages.emplace_back("hr", "Hrvatski");
 	languages.emplace_back("hu", "Magyar");