add collection information to movie details

app/src/main/java/com/owenlejeune/tvtime/api/tmdb/model/Collection.kt

@@ -0,0 +1,10 @@
+package com.owenlejeune.tvtime.api.tmdb.model
+
+import com.google.gson.annotations.SerializedName
+
+class Collection(
+    @SerializedName("id") val id: Int,
+    @SerializedName("name") val name: String,
+    @SerializedName("poster_path") val posterPath: String?,
+    @SerializedName("backdrop_path") val backdropPath: String?
+)

app/src/main/java/com/owenlejeune/tvtime/api/tmdb/model/DetailedMovie.kt

@@ -25,6 +25,7 @@ class DetailedMovie(
     @SerializedName("revenue") val revenue: Int,
     @SerializedName("runtime") val runtime: Int?,
     @SerializedName("imdb_id") val imdbId: String?,
+    @SerializedName("belongs_to_collection") val collection: Collection?
 ): DetailedItem(
     id, title, posterPath, backdropPath, genres, overview,
     productionCompanies, productionCountries, status, tagline, voteAverage,