feat(instance): an instance says where it keeps people's data

Its operator sets DATA_LOCATION and BACKUP_LOCATION in deploy/.env (a
country's code or EU, the backups also none), and instance.info() hands
them on. The first start's tile and Switch account show the flag of
where the data is and the words, as labels ("Data: European Union",
"Backups: Switzerland"), the countries by the world map's CLDR names:
where the disks are, never which law governs. The flags come from the
flag package, which draws flag-icons; its MIT notice joins the licence
list.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

halkyon_learn_flutter/lib/l10n/app_localizations.dart

@@ -3526,6 +3526,36 @@ abstract class AppLocalizations {
   /// **'Enter its address'**
   String get instanceAnotherTagline;
 
+  /// No description provided for @instanceDataAndBackupsIn.
+  ///
+  /// In en, this message translates to:
+  /// **'Data and backups: {place}'**
+  String instanceDataAndBackupsIn(String place);
+
+  /// No description provided for @instanceDataIn.
+  ///
+  /// In en, this message translates to:
+  /// **'Data: {place}'**
+  String instanceDataIn(String place);
+
+  /// No description provided for @instanceBackupsIn.
+  ///
+  /// In en, this message translates to:
+  /// **'Backups: {place}'**
+  String instanceBackupsIn(String place);
+
+  /// No description provided for @instanceNoBackups.
+  ///
+  /// In en, this message translates to:
+  /// **'No backups'**
+  String get instanceNoBackups;
+
+  /// No description provided for @instanceEuropeanUnion.
+  ///
+  /// In en, this message translates to:
+  /// **'European Union'**
+  String get instanceEuropeanUnion;
+
   /// No description provided for @instanceContinue.
   ///
   /// In en, this message translates to: