feat(main-command): add about subcommand, and change method names

plugin/src/main/java/me/bryang/chatlab/command/MainCommand.java

@@ -1,31 +1,55 @@
 package me.bryang.chatlab.command;
 
+import me.bryang.chatlab.UpdateCheckHandler;
 import me.bryang.chatlab.configuration.ConfigurationContainer;
 import me.bryang.chatlab.configuration.section.MessageSection;
 import me.bryang.chatlab.configuration.section.RootSection;
 import me.bryang.chatlab.message.MessageManager;
 import me.fixeddev.commandflow.annotated.CommandClass;
 import me.fixeddev.commandflow.annotated.annotation.Command;
 import me.fixeddev.commandflow.bukkit.annotation.Sender;
+import net.kyori.adventure.text.minimessage.tag.resolver.Placeholder;
 import org.bukkit.entity.Player;
 import team.unnamed.inject.InjectAll;
 
-@Command(names = {"clab", "chatlab"})
+import javax.inject.Named;
+
+@Command(
+	names = {"clab", "chatlab"},
+	desc = "Command to manage the plugin.")
 @InjectAll
 public class MainCommand implements CommandClass {
 
 	private ConfigurationContainer<RootSection> configurationContainer;
 	private ConfigurationContainer<MessageSection> messageContainer;
+	private UpdateCheckHandler updateChecker;
 	private MessageManager messageManager;
+	@Named("plugin-version")
+	private String pluginVersion;
+
+	@Command(names = {""})
+	public void executeMainSubCommand(@Sender Player sender) {
+		messageManager.sendMessage(sender, """
+					<blue>ChatLab: <white>Main plugin command.
+					<dark_grey>- <white>/clab reload <dark_grey>: <green>Reload the plugin.
+					<dark_grey>- <white>/clab check-update <dark_grey>: <green>Check update.
+					<dark_grey>- <white>/clab re-check <dark_grey>: <green>Send a request if has a new update.
+					<dark_grey>- <white>/clab about <dark_grey>: <green>See about the plugin.""");
+
+	}
+	@Command(names = "about")
+	public void executeAboutSubCommand(@Sender Player sender) {
+
+		messageManager.sendMessage(sender, """
+            <green>ChatLab <dark_gray>- <white>Chat plugin.<white>
+            <blue><version>
+            <green>>> <white>Source code: <green><u><click:open_url:'https://github.com/devblook/chatlab>[GitHub]</click></u>""",
+			Placeholder.unparsed("version", pluginVersion));
 
-	@Command(names = "")
-	public void mainSubCommand(@Sender Player sender) {
-		messageManager.sendMessage(sender, "<blue>ChatLab: <white>Main plugin command.");
-		messageManager.sendMessage(sender, "<dark_grey>- <white>/clab reload");
 	}
 
 	@Command(names = "reload", permission = "clab.reload")
-	public void reloadSubCommand(@Sender Player sender) {
+	public void executeReloadSubCommand(@Sender Player sender) {
 
 		configurationContainer.reload();
 		messageContainer.reload();