feat(icons): added `squares-*` operation icons

[EthanHazel]

What is the purpose of this pull request?

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

Description

Icon use case

Icons are built for use with programs that use vector tools like the pathfinder tool (tasks like combining, dividing, and trimming shapes)

Alternative icon designs

Alternate intersect

Alternate minus

Alternate Exclude 1

Alternate Exclude 2

Alternate Exclude 3

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

• [x] The icons are solely my own creation.
• [ ] The icons were originally created in #<issueNumber> by @<githubUser>
• [ ] I've based them on the following Lucide icons:
• [ ] 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.