Add Doujinku (#3954)

src/id/doujinku/build.gradle

@@ -0,0 +1,10 @@
+ext {
+    extName = 'Doujinku'
+    extClass = '.Doujinku'
+    themePkg = 'mangathemesia'
+    baseUrl = 'https://doujinku.org'
+    overrideVersionCode = 0
+    isNsfw = true
+}
+
+apply from: "$rootDir/common.gradle"

src/id/doujinku/src/eu/kanade/tachiyomi/extension/id/doujinku/Doujinku.kt

@@ -0,0 +1,12 @@
+package eu.kanade.tachiyomi.extension.id.doujinku
+
+import eu.kanade.tachiyomi.multisrc.mangathemesia.MangaThemesia
+import java.text.SimpleDateFormat
+import java.util.Locale
+
+class Doujinku : MangaThemesia(
+    "Doujinku",
+    "https://doujinku.org",
+    "id",
+    dateFormat = SimpleDateFormat("MMMM d, yyyy", Locale("id")),
+)