Add AstraScans (#4298)

src/en/astrascans/build.gradle

@@ -0,0 +1,9 @@
+ext {
+    extName = 'Astra Scans'
+    extClass = '.AstraScans'
+    themePkg = 'mangathemesia'
+    baseUrl = 'https://astrascans.org'
+    overrideVersionCode = 0
+}
+
+apply from: "$rootDir/common.gradle"

src/en/astrascans/src/eu/kanade/tachiyomi/extension/en/astrascans/AstraScans.kt

@@ -0,0 +1,15 @@
+package eu.kanade.tachiyomi.extension.en.astrascans
+
+import eu.kanade.tachiyomi.multisrc.mangathemesia.MangaThemesia
+import eu.kanade.tachiyomi.network.interceptor.rateLimit
+
+class AstraScans : MangaThemesia(
+    "Astra Scans",
+    "https://astrascans.org",
+    "en",
+    "/series",
+) {
+    override val client = super.client.newBuilder()
+        .rateLimit(3)
+        .build()
+}