Add GraphQL schema reference for Kitsu

src/AnimeClient/API/Kitsu/GraphQL/.graphqlconfig

@@ -0,0 +1,22 @@
+{
+  "name": "Kitsu Schema",
+  "schemaPath": "schema.graphql",
+  "extensions": {
+    "endpoints": {
+	  "Anilist": {
+		"url": "https://graphql.anilist.co",
+		"headers": {
+		  "user-agent": "JS GraphQL"
+		},
+		"introspect": true
+	  },
+      "Kitsu": {
+        "url": "https://kitsu.io/api/graphql",
+        "headers": {
+          "user-agent": "JS GraphQL"
+        },
+        "introspect": true
+      }
+    }
+  }
+}

src/AnimeClient/API/Kitsu/GraphQL/Mutations/IncrementLibraryItem.graphql

@@ -0,0 +1,8 @@
+mutation($id: ID!, $progress: Int) {
+	updateLibraryEntry(input: { id: $id, progress: $progress }) {
+		libraryEntry {
+			id
+			progress
+		}
+	}
+}

src/AnimeClient/API/Kitsu/GraphQL/Queries/CharacterDetails.graphql

@@ -0,0 +1,24 @@
+query ($slug: String!) {
+	findCharacterBySlug(slug: $slug) {
+		id
+		image {
+			original {
+				url
+			}
+		}
+		names {
+			alternatives
+			canonical
+			#canonicalLocale
+			localized
+		},
+		primaryMedia {
+			posterImage {
+				original {
+					url
+				}
+			}
+		},
+		slug
+	}
+}