feat: add batch 5 base-source wrappers (Madara, MangaThemesia, Keyoapp, MangAdventure)

arcrelight (MangAdventure), baektoons/fablescans (MangaThemesia), epicmanga/ero18x/evilflowers
(Madara), erisscans (Keyoapp); fix wrong HttpSource annotations in phase4 doc.

sources/en/arcrelight/arcrelight.go

@@ -0,0 +1,16 @@
+package arcrelight
+
+import (
+	"goyomi/internal/registry"
+	base "goyomi/sources/base/mangadventure"
+)
+
+func New() *base.Source {
+	return base.New(base.Config{
+		Name:    "Arc-Relight",
+		BaseURL: "https://arc-relight.com",
+		Lang:    "en",
+	})
+}
+
+func init() { registry.Register(New()) }