Add labels and string select menus in modals

[freya022]

Alongside with the new additions, instead of having "input names" to match with your handlers @ModalInput, you can now use the native custom ID, note that it must be unique per modal.

Example changes:

@Command
public class SlashFormat extends ApplicationCommand {
    
    private static final String MODAL_NAME = "SlashFormat: formatModal";
-   private static final String CODE_INPUT_NAME = "SlashFormat: formatModal codeInput";
+   private static final String CODE_INPUT_ID = "SlashFormat: formatModal codeInput";
    
    private final Modals modals;

    public SlashFormat(Modals modals) {
        this.modals = modals;
    }

    @JDASlashCommand(name = "format")
    public void onSlashFormat(GuildSlashEvent event) {
        Modal modal = modals.create("Format your code")
                .bindTo(MODAL_NAME)
                .addComponents(
-                       modals.createTextInput(CODE_INPUT_NAME, "Code", TextInputStyle.SHORT)
+                       Label.of(
+                               "Code",
+                               TextInput.create(CODE_INPUT_ID, TextInputStyle.SHORT).build()
+                       )
                )
                .build();
        
        event.replyModal(modal).queue();
    }
    
    @ModalHandler(MODAL_NAME)
-   public void onFormatModal(ModalEvent event, @ModalInput(CODE_INPUT_NAME) String code) {
+   public void onFormatModal(ModalEvent event, @ModalInput(CODE_INPUT_ID) String code) {
        // ...
    }
}

Breaking changes

• Updated to JDA 6.0.0-rc.4
• (Kotlin only) name of @ModalInput has been updated to customId
• Removed custom TextInputBuilder
  • Use TextInput.create (Java) or TextInput(...) { ... } (Kotlin) instead
  • The given custom ID will be used to match against @ModalInput parameters

Changes

• ActionComponent parameters now accept a broader type, ICustomId

New features

• Added DSLs:
  • Modals (Modals#create(...) { ... })
  • Labels (Label(...) { ... })
  • Text inputs (TextInput(...) { ... })
  • String select menus (StringSelectMenu(...) { ... })