Add RyujinManga (#2423)

src/es/ryujinmanga/build.gradle

@@ -0,0 +1,9 @@
+ext {
+    extName = 'RyujinManga'
+    extClass = '.RyujinManga'
+    themePkg = 'mangathemesia'
+    baseUrl = 'https://ryujinmanga.com'
+    overrideVersionCode = 0
+}
+
+apply from: "$rootDir/common.gradle"

src/es/ryujinmanga/src/eu/kanade/tachiyomi/extension/es/ryujinmanga/RyujinManga.kt

@@ -0,0 +1,12 @@
+package eu.kanade.tachiyomi.extension.es.ryujinmanga
+
+import eu.kanade.tachiyomi.multisrc.mangathemesia.MangaThemesia
+import java.text.SimpleDateFormat
+import java.util.Locale
+
+class RyujinManga : MangaThemesia(
+    "RyujinManga",
+    "https://ryujinmanga.com",
+    "es",
+    dateFormat = SimpleDateFormat("MMMM dd, yyyy", Locale("es")),
+)