feat: Update navigation bar icons

app/src/main/java/org/nsh07/pomodoro/MainActivity.kt

@@ -55,8 +55,8 @@ class MainActivity : ComponentActivity() {
         val screens = listOf(
             NavItem(
                 Screen.Timer,
-                R.drawable.hourglass,
-                R.drawable.hourglass_filled,
+                R.drawable.timer_outlined,
+                R.drawable.timer_filled,
                 "Timer"
             ),
             NavItem(

app/src/main/java/org/nsh07/pomodoro/ui/settingsScreen/SettingsScreen.kt

@@ -138,14 +138,14 @@ private fun SettingsScreen(
                 checked = alarmEnabled,
                 icon = R.drawable.alarm_on,
                 label = "Alarm",
-                description = "Ring your system alarm sound when a timer completes",
+                description = "Ring alarm when a timer completes",
                 onClick = onAlarmEnabledChange
             ),
             SettingsSwitchItem(
                 checked = vibrateEnabled,
                 icon = R.drawable.mobile_vibrate,
                 label = "Vibrate",
-                description = "Vibrate in a repeating pattern when a timer completes",
+                description = "Vibrate when a timer completes",
                 onClick = onVibrateEnabledChange
             )
         )