Make say support both slash and message commands

src/main/java/wtf/beatrice/hidekobot/commands/base/Say.java

@@ -0,0 +1,11 @@
+package wtf.beatrice.hidekobot.commands.base;
+
+import net.dv8tion.jda.api.Permission;
+
+public class Say
+{
+
+    public static Permission getPermission() {
+        return Permission.MESSAGE_MANAGE;
+    }
+}