Refactor radio settings and localization updates

fixes #72

- Removed preset configurations for 915 MHz, 868 MHz, and 433 MHz from the RadioSettings model.
- Introduced a new list of regional preset configurations for various countries.
- Updated the settings screen to use a dropdown for selecting presets instead of chips.
- Added a switch for enabling client repeat functionality with appropriate warnings for frequency usage.
- Updated localization files for multiple languages to reflect changes in settings related to client repeat functionality.

lib/l10n/app_sk.arb

@@ -131,9 +131,6 @@
   "settings_infoContactsCount": "Počet kontaktov",
   "settings_infoChannelCount": "Počet kanálov",
   "settings_presets": "Prednastavenia",
-  "settings_preset915Mhz": "915 MHz",
-  "settings_preset868Mhz": "868 MHz",
-  "settings_preset433Mhz": "433 MHz",
   "settings_frequency": "Frekvencia (MHz)",
   "settings_frequencyHelper": "300,0 – 2500,0",
   "settings_frequencyInvalid": "Neplatná frekvencia (300-2500 MHz)",
@@ -143,8 +140,6 @@
   "settings_txPower": "TX Výkon (dBm)",
   "settings_txPowerHelper": "0 - 22",
   "settings_txPowerInvalid": "Neplatná hodnota výkonu TX (0-22 dBm)",
-  "settings_longRange": "Dlhý dosah",
-  "settings_fastSpeed": "Rýchla rýchlosť",
   "settings_error": "Chyba: {message}",
   "@settings_error": {
     "placeholders": {
@@ -1598,5 +1593,8 @@
   "map_pathTraceCancelled": "Zrušenie stopáže cesty bolo zrušené.",
   "scanner_bluetoothOffMessage": "Prosím, zapnite Bluetooth, aby ste mohli skenovať pre zariadenia.",
   "scanner_bluetoothOff": "Bluetooth je vypnutý",
-  "scanner_enableBluetooth": "Povolte Bluetooth"
+  "scanner_enableBluetooth": "Povolte Bluetooth",
+  "settings_clientRepeat": "Opätovné použitie bez elektrickej siete",
+  "settings_clientRepeatFreqWarning": "Použitie off-grid systému vyžaduje frekvencie 433, 869 alebo 918 MHz.",
+  "settings_clientRepeatSubtitle": "Umožnite, aby toto zariadenie opakovávalo siete pre ostatných."
 }