Improve generate words/images lists, fix/improve relative code

android/gradle.properties

assets/assets_images.json

assets/files/words.json

assets/words.json

fastlane/metadata/android/en-US/changelogs/57.txt

fastlane/metadata/android/fr-FR/changelogs/57.txt

lib/models/word.dart

lib/provider/data.dart

lib/screens/game_pick_image.dart

lib/screens/game_pick_word.dart

lib/screens/home.dart

lib/utils/random_pick_data.dart

lib/utils/random_pick_image.dart

lib/utils/random_pick_word.dart

lib/utils/random_pick_words.dart

pubspec.yaml

scripts/01_download_images.sh

scripts/02_prepare_images.sh

scripts/05_build_assets_list.sh

scripts/words.csv