Menu: Added extra examples + explanation

[Yinzy00]

Description

I added extra examples + explanation to the menu docs for V14 and v15

Type of suggestion

• Typo/grammar fix
• Updated outdated content
• New content
• Updates related to a new version
• Other

Product & version (if relevant)

V14, V15

[sofietoft]

Thanks for this @Yinzy00 🙌 🎉

I've forwarded this to our developers, and I'll make sure we get it reviewed as soon as possible.

[Frost117]

@sofietoft

I ran @Yinzy00 code examples locally and they work on my machine. LGTM :)

[sofietoft]

I've taken the liberty to correct some grammar 💪

Also, I've added a couple of comments.
Please let me know if something doesn't make sense!

Regarding the code snippets, I think it would be great if you could wrap them using the GitBook formats, so we can highlight the file name a little easier.
See the docs for reference: https://docs.gitbook.com/content-editor/blocks/code-block#representation-in-markdown

[sofietoft]

Looks like everything checks out here 🎉

Thanks again for putting in the effort to help us improve the Umbraco documentation.
MUCH appreciated 👏

I'll get this one merged!