Add favorites page (#55)

Closes #38 

Add a nav drawer link to a new favorites page which shows favorited
Movies, TV Shows, and Episodes.

Also adds a button to movies & tv shows to set/unset favorite status.

app/src/main/java/com/github/damontecres/wholphin/data/model/GetItemsFilter.kt

@@ -4,6 +4,7 @@ package com.github.damontecres.wholphin.data.model
 
 import kotlinx.serialization.Serializable
 import kotlinx.serialization.UseSerializers
+import org.jellyfin.sdk.model.api.BaseItemKind
 import org.jellyfin.sdk.model.api.request.GetItemsRequest
 import org.jellyfin.sdk.model.serializer.UUIDSerializer
 import java.util.UUID
@@ -17,9 +18,11 @@ data class GetItemsFilter(
     val played: Boolean? = null,
     val studios: List<UUID>? = null,
     val tags: List<String>? = null,
+    val includeItemTypes: List<BaseItemKind>? = null,
 ) {
     fun applyTo(req: GetItemsRequest) =
         req.copy(
+            includeItemTypes = includeItemTypes,
             isFavorite = favorite,
             genreIds = genres,
             minCriticRating = minCriticRating,