Custom Commands with Clickable Links

Plugins Plugin Requests
2

You could craft something yourself with this.

Untested script:

function onGameInitializationEvent(event){
    var cmd = {
            executor: function(commandSource, commandContext) {
                commandSource.sendMessage(Text.of("Vote: www.test.com"));
            },
            commands: ["vote"]
        };
    commandManager.register(cmd);
}