Add getDiscordBotUrl method to form classes

Implemented getDiscordBotUrl in form classes for dynamic URL handling. Updated VerifyController to use this method for constructing Discord bot URIs. This enhances flexibility and maintainability in form submission handling.

src/main/java/com/alttd/forms/verify_mail/VerifyController.java

@@ -35,7 +35,7 @@ public class VerifyController {
                     try {
                         HttpRequest request = HttpRequest.newBuilder()
                                 //Discord bot url
-                                .uri(new URI("http://discordbot:8001/api/contact/submitContactForm"))//TODO get uri from form
+                                .uri(new URI(form.getDiscordBotUrl()))//TODO get uri from form
                                 .header("Content-Type", "application/json;charset=UTF-8")
                                 .POST(HttpRequest.BodyPublishers.ofString(form.toJsonString(), StandardCharsets.UTF_8))
                                 .build();