Set up internationalization framework with Java ResourceBundle

.idea/encodings.xml

.idea/fileTemplates/code/I18nized Concatenation.java

.idea/fileTemplates/code/I18nized Expression.java

.idea/inspectionProfiles/Project_Default.xml

.tx/config

build.gradle.kts

src/main/kotlin/org/briarproject/briar/desktop/Main.kt

...lin/org/briarproject/briar/desktop/contact/ContactCard.kt

...org/briarproject/briar/desktop/contact/ContactDropDown.kt

...org/briarproject/briar/desktop/contact/SearchTextField.kt

...rproject/briar/desktop/conversation/ConversationHeader.kt

...arproject/briar/desktop/conversation/ConversationInput.kt

...org/briarproject/briar/desktop/conversation/TextBubble.kt

...ject/briar/desktop/introduction/ContactDrawerMakeIntro.kt

...main/kotlin/org/briarproject/briar/desktop/login/Login.kt

...tlin/org/briarproject/briar/desktop/login/Registration.kt

...project/briar/desktop/settings/PlaceHolderSettingsView.kt

src/main/kotlin/org/briarproject/briar/desktop/ui/BriarUi.kt

...rproject/briar/desktop/utils/InternationalizationUtils.kt

src/main/resources/strings/BriarDesktop.properties