add uucore locale files

Author: sylvestre

src/uucore/locales/en-US.ftl

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+# Common strings shared across all uutils commands
+# Mostly clap
+
+# Generic words
+common-error = error
+common-tip = tip
+common-usage = Usage
+common-help = help
+common-version = version
+
+# Common clap error messages
+clap-error-unexpected-argument = { $error_word }: unexpected argument '{ $arg }' found
+clap-error-similar-argument = { $tip_word }: a similar argument exists: '{ $suggestion }'
+clap-error-pass-as-value = { $tip_word }: to pass '{ $arg }' as a value, use '{ $tip_command }'
+clap-error-invalid-value = { $error_word }: invalid value '{ $value }' for '{ $option }'
+clap-error-value-required = { $error_word }: a value is required for '{ $option }' but none was supplied
+clap-error-possible-values = possible values
+clap-error-help-suggestion = For more information, try '{ $command } --help'.
+common-help-suggestion = For more information, try '--help'.
+
+# Common help text patterns
+help-flag-help = Print help information
+help-flag-version = Print version information
+
+# Common error contexts
+error-io = I/O error
+error-permission-denied = Permission denied
+error-file-not-found = No such file or directory
+error-invalid-argument = Invalid argument
+
+# Common actions
+action-copying = copying
+action-moving = moving
+action-removing = removing
+action-creating = creating
+action-reading = reading
+action-writing = writing

src/uucore/locales/fr-FR.ftl

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+# Chaînes communes partagées entre toutes les commandes uutils
+# Principalement pour clap
+
+# Mots génériques
+common-error = erreur
+common-tip = conseil
+common-usage = Utilisation
+common-help = aide
+common-version = version
+
+# Messages d'erreur clap communs
+clap-error-unexpected-argument = { $error_word } : argument inattendu '{ $arg }' trouvé
+clap-error-similar-argument = { $tip_word } : un argument similaire existe : '{ $suggestion }'
+clap-error-pass-as-value = { $tip_word } : pour passer '{ $arg }' comme valeur, utilisez '{ $tip_command }'
+clap-error-invalid-value = { $error_word } : valeur invalide '{ $value }' pour '{ $option }'
+clap-error-value-required = { $error_word } : une valeur est requise pour '{ $option }' mais aucune n'a été fournie
+clap-error-possible-values = valeurs possibles
+clap-error-help-suggestion = Pour plus d'informations, essayez '{ $command } --help'.
+common-help-suggestion = Pour plus d'informations, essayez '--help'.
+
+# Modèles de texte d'aide communs
+help-flag-help = Afficher les informations d'aide
+help-flag-version = Afficher les informations de version
+
+# Contextes d'erreur communs
+error-io = Erreur E/S
+error-permission-denied = Permission refusée
+error-file-not-found = Aucun fichier ou répertoire de ce type
+error-invalid-argument = Argument invalide
+
+# Actions communes
+action-copying = copie
+action-moving = déplacement
+action-removing = suppression
+action-creating = création
+action-reading = lecture
+action-writing = écriture