new icon: dyalog (original, original-wordmark)

[gewaleelek]

Double check these details before you open a PR

• PR does not match another non-stale PR currently opened
• PR name matches the format new icon: Icon name (versions separated by comma). More details here
• PR's base is the develop branch.
• Your icons are inside a folder as seen here
• SVG matches the standards laid out here
• A new object is added in the devicon.json file at the correct alphabetic position as seen here

This PR closes #254

Link to prove your SVG is correct and up-to-date.

• Dyalog product page and the site's favicon - a simple orange "D" logo
• Help page of the latest version of Dyalog - a simple orange "Dyalog" logo

Note: the request #254 uses the "cube" background behind the D, which can be found in here and here, but it does not seem to be as prominent as the simple "D" and "Dyalog". Do let me know if you think I should use that instead.

[github-actions]

Hi!

I'm the check-bot and we have some issues with your PR:

devicon.json is not sorted correctly.
Please make sure that your icon is added in the `devicon.json` file at the correct alphabetic position
as seen here: https://github.com/devicons/devicon/wiki/Updating-%60devicon.json%60

Check our CONTRIBUTING guide for more details regarding these errors.

Please address these issues. When you update this PR, I will check your SVGs again.

Thanks for your help,
SVG-Checker Bot 😄

[weh]

LGTM 👍

[canaleal]

Excellent stuff. SVGs look great and there are no weird artifacts in icomoon.