Add HyperlinkedImage + OrderedList components

[Revxrsal]

Added 2 more components to the library which appear to be missing (???)

HyperlinkedImage

    @Test
    public void withTooltip() {
        String text = new BoldText("Example alt text").toString();
        String imageURL = "https://i.imgur.com/rP1uBWg.png";
        String redirectTo = "https://github.com/Steppschuh/Java-Markdown-Generator";
        String tooltip = "Java Markdown Generator is very useful!";
        HyperlinkedImage image = new HyperlinkedImage(text, imageURL, redirectTo, tooltip);
        System.out.println(image.toString());
    }

Would result in the following:

[![**Example alt text**](https://i.imgur.com/rP1uBWg.png "Java Markdown Generator is very useful!")](https://github.com/Steppschuh/Java-Markdown-Generator)

Which renders as (hover over):

Without tooltip:

    @Test
    public void withoutTooltip() {
        String text = new BoldText("Example alt text").toString();
        String imageURL = "https://i.imgur.com/rP1uBWg.png";
        String redirectTo = "https://github.com/Steppschuh/Java-Markdown-Generator";
        HyperlinkedImage image = new HyperlinkedImage(text, imageURL, redirectTo, null);
        System.out.println(image.toString());
    }

Would result in the following:

[![**Example alt text**](https://i.imgur.com/rP1uBWg.png)](https://github.com/Steppschuh/Java-Markdown-Generator)

Which renders as (hover over):

*Can have hyperlink as null too, with or without a tooltip*

OrderedList

    @Test
    public void renderOrderedList() {
        OrderedList list = new OrderedList();
        list.add(new OrderedListItem("An element")).add(new OrderedListItem("Another element through chaining"));
        System.out.println(list);
    }

Would create:

1. An element
2. Another element through chaining

Which results in:

1. An element
2. Another element through chaining

With builder:

    @Test
    public void orderedListWithBuilder() {
        OrderedList list = new OrderedListBuilder()
                .append("A")
                .append("B")
                .build();
        System.out.println(list);
    }

Would create:

1. A
2. B

Which results into:

1. A
2. B

Let me know if anything should be changed.

[Steppschuh]

Hey, thanks a lot for your contribution!

[Steppschuh]

Would be nice if you could also add examples to the readme and maybe some test cases. If you don't feel like it that's also fine, in that case I'll do it later.

[Javakky]

@Steppschuh
I need this change. Can I ask for a review?

[Revxrsal]

@Steppschuh I need this change. Can I ask for a review?

This PR is old and probably wouldn't merge correctly. I suggest you create your own fork, introduce the changes as appropriate, and create another pull request.

[Javakky-pxv]

@Revxrsal
Thanks! I'll try.