Major code refactoring

Main goals are:
1. Ability to use mocks in unit tests instead of
having to setup mock web server as if it was an
integration test.
2. Cache Retrofit services in memory
3. Make it easier to read
4. Use OptIn where possible instead of propagating
Experimental* annotations everywhere

app/src/main/java/gq/kirmanak/mealient/di/RecipeModule.kt

@@ -1,12 +1,14 @@
 package gq.kirmanak.mealient.di
 
-import androidx.paging.ExperimentalPagingApi
 import androidx.paging.InvalidatingPagingSourceFactory
 import dagger.Binds
 import dagger.Module
 import dagger.Provides
 import dagger.hilt.InstallIn
 import dagger.hilt.components.SingletonComponent
+import gq.kirmanak.mealient.data.impl.RetrofitBuilder
+import gq.kirmanak.mealient.data.network.ServiceFactory
+import gq.kirmanak.mealient.data.network.createServiceFactory
 import gq.kirmanak.mealient.data.recipes.RecipeImageLoader
 import gq.kirmanak.mealient.data.recipes.RecipeRepo
 import gq.kirmanak.mealient.data.recipes.db.RecipeStorage
@@ -15,11 +17,9 @@ import gq.kirmanak.mealient.data.recipes.impl.RecipeImageLoaderImpl
 import gq.kirmanak.mealient.data.recipes.impl.RecipeRepoImpl
 import gq.kirmanak.mealient.data.recipes.network.RecipeDataSource
 import gq.kirmanak.mealient.data.recipes.network.RecipeDataSourceImpl
-import kotlinx.serialization.ExperimentalSerializationApi
+import gq.kirmanak.mealient.data.recipes.network.RecipeService
 import javax.inject.Singleton
 
-@ExperimentalPagingApi
-@ExperimentalSerializationApi
 @Module
 @InstallIn(SingletonComponent::class)
 interface RecipeModule {
@@ -36,6 +36,13 @@ interface RecipeModule {
     fun provideRecipeImageLoader(recipeImageLoaderImpl: RecipeImageLoaderImpl): RecipeImageLoader
 
     companion object {
+
+        @Provides
+        @Singleton
+        fun provideRecipeServiceFactory(retrofitBuilder: RetrofitBuilder): ServiceFactory<RecipeService> {
+            return retrofitBuilder.createServiceFactory()
+        }
+
         @Provides
         @Singleton
         fun provideRecipePagingSourceFactory(