feat(mini-message): add Formatter#joining - #938

  public static TagResolver joining(@TagPattern final @NotNull String key, final @NotNull Iterable<? extends TagResolver> components) {
    return TagResolver.resolver(key, (arguments, ctx) -> {
        String format = arguments.popOr("expected list format").value();
        String separator = arguments.popOr("expected separator").value();
        if (arguments.hasNext()) {
            String emptyVal = arguments.pop().value();
            if (resolvers.isEmpty()) return Tag.inserting(ctx.deserialize(emptyVal));
        }
        List<Component> components = resolvers.stream().map(r -> ctx.deserialize(format, r)).toList();
        Component separatorComponent = ctx.deserialize(separator);
        Component all = components.stream().collect(Component.toComponent(separatorComponent));

        if (arguments.hasNext()) {
            int amount = arguments.popOr("maximum amount").asInt().orElse(5);
            String lastInfo = arguments.popOr("last entry").value();
            String hoverFormat = arguments.popOr("hover").value();
            if (resolvers.size() > amount) {
                Component hover = ctx.deserialize(hoverFormat,
                        Formatter.number("total", resolvers.size()),
                        Formatter.number("remaining", resolvers.size() - amount),
                        Placeholder.component("all", all));
                Component remaining = ctx.deserialize(lastInfo,
                        Formatter.number("total", resolvers.size()),
                        Formatter.number("remaining", resolvers.size() - amount)).hoverEvent(hover);
                return Tag.selfClosingInserting(components.stream().limit(amount).collect(Component.toComponent(separatorComponent)).append(remaining));
            }
        }
        return Tag.selfClosingInserting(all);
  });
}