new icon: kubeflow (original, original-wordmark, plain, plain-wordmark, line, line-wordmark)

[weh]

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 as seen here

**This PR closes #2086 **

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

[canaleal]

Nice! Thank you for the contribution! 😄

The json looks excellent, but the SVGs need a few modifications.

The viewboxes for all SVGs are not 0 0 128 128 and the plain-wordmark svg has strokes that should be converted into a unified path.

[weh]

sorry @canaleal, looks like i committed the unfinished files. should be fixed now.

[canaleal]

Great work.

I left a few comments about the padding/alignment on some of the SVGs, but aside from that everything else looks excellent.

[weh]

@canaleal i fixed the image box issues. hope this time i got it right 🤞