fix: Update single-direction-scroll-demo xml to json

[varshneydevansh]

Issue

• Update single-direction-scroll-demo to use JSON toolbox definitions instead of xml #1264

Category

• Examples > single-direction-scroll-demo

Proposed Solution

• Update the code in blockly-samples to use the JSON toolbox API.

Result

• After testing, it's working the same way it did before with the XML.

[conventional-commit-lint-gcf]

🤖 I detect that the PR title and the commit message differ and there's only one commit. To use the PR title for the commit history, you can use Github's automerge feature with squashing, or use automerge label. Good luck human!

-- conventional-commit-lint bot
https://conventionalcommits.org/

[BeksOmega]

Hello! Thank you for the fix =) This conversion LGTM!

With regard to the CI failure, could you do git commit --amend to fix your commit message? We have more detailed instructions here: https://developers.google.com/blockly/guides/contribute/get-started/commits#fixing_non-conventional_commits

Once CI passes I'll get this merged!

[varshneydevansh]

I did try it at the night but forgot to do the push as it was late at night, so I went to sleep.

Doing it now.

[varshneydevansh]

I just removed an empty line.

[varshneydevansh]

@BeksOmega I was doing this issue #6280 and this issue was linked to it.