feat(icons): Add `cloud-check` icon

[lscheibel]

closes #2564 closes #2160

What is the purpose of this pull request?

• [x] New Icon
• [ ] Bug fix
• [ ] New Feature
• [ ] Documentation update
• [ ] Other:

Description

Adds new cloud-check icon

Icon use case

My use case is for a "sync with cloud" feature, where I show the icon similar to how Google Docs does it, when the document is in sync with what is stored on the server.

I can't think of other non-arbitrary use cases, but considering the popularity of Google Docs as well as the two related issues, I'd say this is not particularly niche.

Alternative icon designs

#2564 contains a few other designs. The icon is very similar to those posted there, especially the one from @jguddas but with the checkmark more balanced within the cloud (imo, of course).

I'm using this design for a project, but since there are other designs available as well feel free to close this PR if it doesn't match your expectations.

Icon Design Checklist

Concept

• [x] I have provided valid use cases for each icon.
• [x] I have not added any a brand or logo icon.
• [x] I have not used any hate symbols.
• [x] I have not included any religious or political imagery.

Author, credits & license

• [ ] The icons are solely my own creation.
• [x] The icons were originally created* in #2564 by @jguddas. (*influenced by)
• [x] I've based them on the following Lucide icons: cloud, circle-check
• [ ] I've based them on the following design:

Naming

• [x] I've read and followed the naming conventions
• [x] I've named icons by what they are rather than their use case.
• [x] I've provided meta JSON files in icons/[iconName].json.

Design

• [x] I've read and followed the icon design guidelines
• [x] I've made sure that the icons look sharp on low DPI displays.
• [x] I've made sure that the icons look consistent with the icon set in size, optical volume and density.
• [x] I've made sure that the icons are visually centered.
• [x] I've correctly optimized all icons to three points of precision.

Before Submitting

• [x] I've read the Contribution Guidelines.
• [x] I've checked if there was an existing PR that solves the same issue.