Add information in exception for session not started and complete javadoc
Fix dictionary file URI
Add test suite for the DictionaryManager class
Make the dictionary extension constant public
Add method for getting the size of the dictionary
Add methods for adding words to session and custom dictionaries
Implement tests for DictionaryManager
Add log when loading dictionaries
Fix translation key
Add @SuppressWarnings for DictionaryTest class
Add logs in LetterReplacement
Add translation files for the application

only French and English available.
Add a TranslatioKeys class which contains the structure of the translation file
Update TranslationKeys class to fix minor Sonar warnings
Add tests for TranslationsKeys class
Use DictionaryManager in LetterReplacement strategy
Add missing javadoc