Fix alerts-only country-recommended sources leaking into weather picker

WeatherSourcesForLocationSheet's recommendedSources list wasn't
filtered by Capability.WEATHER (unlike its globalSources list),
so an alerts-only source recommended for a country could appear,
and even get auto-selected, as a weather source. Every country's
recommended source has so far also been a weather source, so this
never surfaced until an alerts-only country-recommended source
existed.

Also make new-location alert-source selection fall back to the
country's recommended alerts source when the chosen weather source
isn't itself alerts-capable, instead of only pairing alerts when
the weather source happens to be self-paired.

app/src/main/java/com/pranshulgg/weather_master_app/feature/search/SearchScreenViewModel.kt

@@ -9,6 +9,7 @@ import androidx.lifecycle.viewModelScope
 import com.pranshulgg.weather_master_app.R
 import com.pranshulgg.weather_master_app.core.model.sources.Capability
 import com.pranshulgg.weather_master_app.core.model.sources.SearchSource
+import com.pranshulgg.weather_master_app.core.model.sources.getSourcesForCountry
 import com.pranshulgg.weather_master_app.core.model.domain.location.Location
 import com.pranshulgg.weather_master_app.core.model.domain.toAppException
 import com.pranshulgg.weather_master_app.core.model.domain.toMessageRes
@@ -84,7 +85,9 @@ class SearchScreenViewModel @Inject constructor(
                 val alertSource = if (Capability.ALERTS in weatherSource.capabilities) {
                     weatherSource
                 } else {
-                    resolved.alertSource
+                    getSourcesForCountry(resolved.countryCode?.uppercase())
+                        .firstOrNull { Capability.ALERTS in it.capabilities }
+                        ?: resolved.alertSource
                 }
                 locationsRepo.saveLocation(resolved.copy(source = weatherSource, alertSource = alertSource))
                 onBack()

app/src/main/java/com/pranshulgg/weather_master_app/feature/shared/ui/SharedBottomSheets.kt

@@ -55,6 +55,7 @@ object SharedBottomSheet {
     ) {
         if (show) {
             val recommendedSources = getSourcesForCountry(countryCode?.uppercase())
+                .filter { Capability.WEATHER in it.capabilities }
             val globalSources = getSourcesGlobal().filter { Capability.WEATHER in it.capabilities }
 
             val isApiKeyAvailable: (Source) -> Boolean = { source ->