new icon: stimulus (original, original-wordmark, plain-wordmark)

[Mathias-nextech]

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Stimulus

[weh]

The current PR is good to merge, but i would suggest to also add a wormark version. We already have the Turbo Icon including Wordmark --> https://github.com/devicons/devicon/pull/2359/files

[Mathias-nextech]

What do you want me to do ?
Add the wordmark version in this pull request ?

[weh]

What do you want me to do ? Add the wordmark version in this pull request ?

Yes, just add it in this PR as stimulus-original-wordmark.svg and update the devicon.json file accordingly