Docs: Use npx degit instead of git clone in tutorials

[filipsobol]

Suggested merge commit message (convention)

Docs: Use npx degit instead of git clone in tutorials. See #17182.

---

Additional information

For example – encountered issues, assumptions you had to make, other affected tickets, etc.

[filipsobol]

The npx commands are often too long because of the long files paths.

This is an issue because the code snippet cannot be copied using the “Copy” button, as these commands are supposed to be run consecutively.

One way to fix this it to rename the repository from ckeditor5-tutorials-examples to ckeditor5-tutorials or even just tutorials and change the folder names. How do you feel about this? @Witoso @gorzelinski

[Witoso]

IMHO, let's first merge asap, as there's another issue reported: #17239

[gorzelinski]

I added some nitpicks. The commands should work as expected. I like the idea of shortening the file paths.