Add region management

This adds region management: the user can manage a list of available regions
and for each channel pick a region from that list to apply to messages.

Region discovery from nearby repeaters will be done in a separate PR.

This is a part of the work needed for #120.

lib/l10n/app_en.arb

@@ -127,7 +127,6 @@
       }
     }
   },
-  
   "scanner_stop": "Stop",
   "scanner_scan": "Scan",
   "scanner_bluetoothOff": "Bluetooth is off",
@@ -149,6 +148,22 @@
   "settings_radioSettings": "Radio Settings",
   "settings_radioSettingsSubtitle": "Frequency, power, spreading factor",
   "settings_radioSettingsUpdated": "Radio settings updated",
+  "settings_regionSettings": "Regions",
+  "settings_regionSettingsSubtitle": "Manage stored regions",
+  "settings_regionManagement_screenTitle": "Region Management",
+  "settings_regionNameHint": "Enter region name",
+  "settings_regionAddRegion": "Add region",
+  "settings_regionName": "Region Name",
+  "settings_regionDeleted": "Region deleted",
+  "settings_deleteRegion": "Delete Region",
+  "settings_deleteRegionConfirm": "Remove \"{region}\" from region list?",
+  "@settings_deleteRegionConfirm": {
+    "placeholders": {
+      "region": {
+        "type": "String"
+      }
+    }
+  },
   "settings_location": "Location",
   "settings_locationSubtitle": "GPS coordinates",
   "settings_locationUpdated": "Location and GPS settings updated",
@@ -606,6 +621,18 @@
   "channels_scanQrCodeComingSoon": "Coming soon",
   "channels_enterHashtag": "Enter hashtag",
   "channels_hashtagHint": "e.g. #team",
+  "channels_regionSetTo": "Region: {region}",
+  "@channels_regionSetTo": {
+    "placeholders": {
+      "region": {
+        "type": "String",
+        "example": "de-mitte"
+      }
+    }
+  },
+  "channels_regionNotSet": "Region: none",
+  "channels_regionSelect_Title": "Select a region",
+  "channels_clearRegion": "Clear region",
   "chat_noMessages": "No messages yet",
   "chat_sendMessage": "Send message",
   "chat_sendMessageTo": "Send message to {name}",
@@ -2065,7 +2092,6 @@
   "radioStats_stripWaiting": "Fetching radio stats…",
   "radioStats_settingsTile": "Radio stats",
   "radioStats_settingsSubtitle": "Noise floor, RSSI, SNR, and airtime",
-
   "translation_title": "Translation",
   "translation_enableTitle": "Enable translation",
   "translation_enableSubtitle": "Translate incoming messages and allow pre-send translation.",
@@ -2119,4 +2145,4 @@
   },
   "translation_translationOptions": "Translation options",
   "translation_systemLanguage": "System language"
-}
+}