Simplify network layer (#175)

* Use Ktor for network requests

* Remove V0 version

* Remove Retrofit dependency

* Fix url

* Update versions of dependencies

* Revert kotlinx-datetime

Due to https://github.com/Kotlin/kotlinx-datetime/issues/304

* Rename leftovers

* Remove OkHttp

* Remove unused manifest

* Remove unused Hilt module

* Fix building empty image URLs

* Use OkHttp as engine for Ktor

* Reduce visibility of internal classes

* Fix first set up test

* Store only auth token, not header

* Remove UnitInfo/FoodInfo/VersionInfo/NewShoppingListItemInfo

* Remove RecipeSummaryInfo and ShoppingListsInfo

* Remove FullShoppingListInfo

* Remove ParseRecipeURLInfo

* Remove FullRecipeInfo

* Sign out if access token does not work

* Rename getVersionInfo method

* Update version name

database_test/src/main/kotlin/gq/kirmanak/mealient/database/TestData.kt

@@ -15,7 +15,7 @@ val CAKE_RECIPE_SUMMARY_ENTITY = RecipeSummaryEntity(
     description = "A tasty cake",
     dateAdded = LocalDate.parse("2021-11-13"),
     dateUpdated = LocalDateTime.parse("2021-11-13T15:30:13"),
-    imageId = "cake",
+    imageId = "1",
     isFavorite = false,
 )
 
@@ -26,7 +26,7 @@ val PORRIDGE_RECIPE_SUMMARY_ENTITY = RecipeSummaryEntity(
     description = "A tasty porridge",
     dateAdded = LocalDate.parse("2021-11-12"),
     dateUpdated = LocalDateTime.parse("2021-10-13T17:35:23"),
-    imageId = "porridge",
+    imageId = "2",
     isFavorite = false,
 )