Add the 3D model SVG

[zackkrida]

Fixes

Fixes #1122 by @panchovm

Description

Adds a new svg icon file for the 3D model icon.

Testing Instructions

Perhaps view the file in your browser? Maybe change the color svg {color: salmon} in css to confirm that currentColor is working?

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
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• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.

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[dhruvkb]

I think we need to wrap all the paths inside a g#icon so that VIcon can properly render it. You can see a different SVG for reference.

[zackkrida]

That's right, thanks @dhruvkb. I don't love that pattern and we'll need to reassess using svg <use /> if we ever need more granular control of styling parts of icons, but I've updated the PR.

[dhruvkb]

LGTM now, we should make an RFC for the best way to use SVGs.