feat: federation panel + Dart SDK federation methods (0.70.0)

A new 'Föderation' destination (primary side) lists connected
satellites — name, region, version, wire version, advertised
capabilities — and adds them in one step: 'Add satellite' issues a
single-use bootstrap token bundled with the primary CA as a
ready-to-paste satellite config (the bundled CA makes the first
connect tamper-proof). Localized EN + DE, in-app help doc. Uses the
new HubService.listSatellites / issueSatelliteToken wrapping the
SDK's federation methods.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

lib/l10n/app_localizations.dart

@@ -4470,6 +4470,114 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Open Settings'**
   String get hubUnreachableOpenSettings;
+
+  /// No description provided for @navFederation.
+  ///
+  /// In en, this message translates to:
+  /// **'Federation'**
+  String get navFederation;
+
+  /// No description provided for @federationTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Federation'**
+  String get federationTitle;
+
+  /// No description provided for @federationReloadTooltip.
+  ///
+  /// In en, this message translates to:
+  /// **'Reload satellites'**
+  String get federationReloadTooltip;
+
+  /// No description provided for @federationAddSatellite.
+  ///
+  /// In en, this message translates to:
+  /// **'Add satellite'**
+  String get federationAddSatellite;
+
+  /// No description provided for @federationEmptyTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'No satellites connected'**
+  String get federationEmptyTitle;
+
+  /// No description provided for @federationEmptyHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Connect another hub as a satellite to run capabilities on it. Issue an enrollment token to get started.'**
+  String get federationEmptyHint;
+
+  /// No description provided for @federationPillConnected.
+  ///
+  /// In en, this message translates to:
+  /// **'connected'**
+  String get federationPillConnected;
+
+  /// No description provided for @federationRegionNone.
+  ///
+  /// In en, this message translates to:
+  /// **'no region'**
+  String get federationRegionNone;
+
+  /// No description provided for @federationCapabilities.
+  ///
+  /// In en, this message translates to:
+  /// **'{count} advertised capabilities'**
+  String federationCapabilities(int count);
+
+  /// No description provided for @federationAddDialogTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Issue an enrollment token'**
+  String get federationAddDialogTitle;
+
+  /// No description provided for @federationNameLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Satellite name'**
+  String get federationNameLabel;
+
+  /// No description provided for @federationIssueButton.
+  ///
+  /// In en, this message translates to:
+  /// **'Issue'**
+  String get federationIssueButton;
+
+  /// No description provided for @federationIssueFailed.
+  ///
+  /// In en, this message translates to:
+  /// **'Could not issue token: {error}'**
+  String federationIssueFailed(String error);
+
+  /// No description provided for @federationEnrollmentTitle.
+  ///
+  /// In en, this message translates to:
+  /// **'Enroll {name}'**
+  String federationEnrollmentTitle(String name);
+
+  /// No description provided for @federationTokenLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Bootstrap token (single use)'**
+  String get federationTokenLabel;
+
+  /// No description provided for @federationConfigLabel.
+  ///
+  /// In en, this message translates to:
+  /// **'Satellite config (paste into the satellite)'**
+  String get federationConfigLabel;
+
+  /// No description provided for @federationCopied.
+  ///
+  /// In en, this message translates to:
+  /// **'Copied to clipboard'**
+  String get federationCopied;
+
+  /// No description provided for @federationEnrollmentHint.
+  ///
+  /// In en, this message translates to:
+  /// **'Hand the token to the satellite operator over a secure channel. The bundled CA makes the satellite\'s first connect tamper-proof.'**
+  String get federationEnrollmentHint;
 }
 
 class _AppLocalizationsDelegate