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

app/src/androidTest/kotlin/gq/kirmanak/mealient/response.VersionResponses.kt

@@ -5,11 +5,15 @@ import okhttp3.mockwebserver.MockResponse
 import okhttp3.mockwebserver.MockWebServer
 import okhttp3.mockwebserver.RecordedRequest
 
-val versionV1Response = MockResponse().setResponseCode(200).setBody(
-    """{"production":true,"version":"v1.0.0beta-5","demoStatus":false,"allowSignup":true}"""
-)
+val versionV1Response = MockResponse()
+    .setResponseCode(200)
+    .setHeader("Content-Type", "application/json")
+    .setBody("""{"production":true,"version":"v1.0.0beta-5","demoStatus":false,"allowSignup":true}""")
 
-val notFoundResponse = MockResponse().setResponseCode(404).setBody("""{"detail":"Not found"}"""")
+val notFoundResponse = MockResponse()
+    .setResponseCode(404)
+    .setHeader("Content-Type", "application/json")
+    .setBody("""{"detail":"Not found"}"""")
 
 fun MockWebServer.dispatch(block: (String, RecordedRequest) -> MockResponse) {
     dispatcher = object : Dispatcher() {