feat(todo): pick a place on a map, for quick add and a task's Where (ADR 0033, D32)

The location picker searches by city or district and name through
PlaceSearchGateway, its results a list and pins on Train's OpenFreeMap map,
or takes a pin placed by hand; recent places, and None, Arrive or Leave.
TodoDependencies.places is the seam for the instance's search; until then
komoot's public Photon, in a debug build asked for it alone. Quick add has
`+` suggestions, an entry in its + menu and a pin button; the task sheet a
Where box; a task's row the place's name.

ReminderScheduler plans the places to watch into LocationReminderGateway,
a no-op off Android, which TodoPerson.dispose clears, and Settings' Reminders
says while the device may not watch them.

Whats-New: Tasks can have locations: type + or use the + menu, search by city and name or pick on the map, and be reminded on arriving or leaving (Android).
Whats-New-De: Aufgaben können Orte haben: Tippe + oder nutze das +-Menü, suche nach Stadt und Name oder wähle auf der Karte, und lass dich beim Ankommen oder Verlassen erinnern (Android).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Signed-off-by: Tizian 「ティツィアーン」 <raisondetredev@pm.me>

apps/todo/halkyon_todo_flutter/lib/l10n/app_localizations.dart

@@ -1743,6 +1743,156 @@ abstract class AppLocalizations {
   /// In en, this message translates to:
   /// **'Filter by project'**
   String get planFilterTitle;
+
+  /// Quick add's + menu and its button (ADR 0033, D32).
+  ///
+  /// In en, this message translates to:
+  /// **'Location'**
+  String get locationTitle;
+
+  /// A task's Where, and the picker's button.
+  ///
+  /// In en, this message translates to:
+  /// **'Add location'**
+  String get locationAdd;
+
+  /// The heading of a task's places.
+  ///
+  /// In en, this message translates to:
+  /// **'Where'**
+  String get locationWhere;
+
+  /// Under a task's Where, with several places: they are alternatives.
+  ///
+  /// In en, this message translates to:
+  /// **'Any of these'**
+  String get locationAnyOf;
+
+  /// The location picker's search field.
+  ///
+  /// In en, this message translates to:
+  /// **'City or district, then the name'**
+  String get locationSearchHint;
+
+  /// Quick add, as + is typed.
+  ///
+  /// In en, this message translates to:
+  /// **'Search for a place'**
+  String get locationSearchAny;
+
+  /// Quick add, as +something is typed.
+  ///
+  /// In en, this message translates to:
+  /// **'Search for “{query}”'**
+  String locationSearchFor(String query);
+
+  /// The location picker without a place search.
+  ///
+  /// In en, this message translates to:
+  /// **'Search isn\'t available here. Move the map and tap to place a pin.'**
+  String get locationSearchUnavailable;
+
+  /// The location picker after a failed search.
+  ///
+  /// In en, this message translates to:
+  /// **'The search didn\'t work. Try again.'**
+  String get locationSearchFailed;
+
+  /// The location picker, a search without results.
+  ///
+  /// In en, this message translates to:
+  /// **'Nothing found'**
+  String get locationNoResults;
+
+  /// The location picker's places of the person's tasks.
+  ///
+  /// In en, this message translates to:
+  /// **'Recent'**
+  String get locationRecent;
+
+  /// The name of a pin placed by hand where nothing names the spot.
+  ///
+  /// In en, this message translates to:
+  /// **'Pinned place'**
+  String get locationPin;
+
+  /// The name field of a pin placed by hand.
+  ///
+  /// In en, this message translates to:
+  /// **'Name'**
+  String get locationName;
+
+  /// The map's button.
+  ///
+  /// In en, this message translates to:
+  /// **'My position'**
+  String get locationMine;
+
+  /// A location's reminder.
+  ///
+  /// In en, this message translates to:
+  /// **'No reminder'**
+  String get locationRemindNone;
+
+  /// A location's reminder.
+  ///
+  /// In en, this message translates to:
+  /// **'On arriving'**
+  String get locationRemindArrive;
+
+  /// A location's reminder.
+  ///
+  /// In en, this message translates to:
+  /// **'On leaving'**
+  String get locationRemindLeave;
+
+  /// A task's location's menu.
+  ///
+  /// In en, this message translates to:
+  /// **'Remove'**
+  String get locationRemove;
+
+  /// Before asking for the position in the background.
+  ///
+  /// In en, this message translates to:
+  /// **'Allow location all the time'**
+  String get locationAccessTitle;
+
+  /// Before asking for the position in the background.
+  ///
+  /// In en, this message translates to:
+  /// **'To remind you when you arrive or leave, Halkyon Todo needs your position while it is closed too. It stays on this device. Next, choose “Allow all the time”.'**
+  String get locationAccessHint;
+
+  /// Before asking for the position in the background.
+  ///
+  /// In en, this message translates to:
+  /// **'Continue'**
+  String get locationAccessGo;
+
+  /// Settings' Reminders while places are planned and may not be watched.
+  ///
+  /// In en, this message translates to:
+  /// **'Location is off for reminders'**
+  String get locationOffTitle;
+
+  /// Settings' Reminders while places are planned and may not be watched.
+  ///
+  /// In en, this message translates to:
+  /// **'Reminders at a place need “Allow all the time”.'**
+  String get locationOffHint;
+
+  /// A reminder on arriving, below the task's title.
+  ///
+  /// In en, this message translates to:
+  /// **'You\'re at {name}'**
+  String locationArrived(String name);
+
+  /// A reminder on leaving, below the task's title.
+  ///
+  /// In en, this message translates to:
+  /// **'You\'ve left {name}'**
+  String locationLeft(String name);
 }
 
 class _AppLocalizationsDelegate