Add clipboard-plus and clipboard-minus icons

[ericfennis]

What is the purpose of this pull request?

• New Icon
• Bug fix
• New Feature
• Documentation update
• Other:

Description

Adding clipboard-plus and clipboard-minus.

Icon use case

• Adding something to the clipboard
• clipboard-plus could be used for medical use cases (not ideal), like doctor reports.
• Removing something from the clipboard

Icon Design Checklist

Concept

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

Author, credits & license

• The icons are solely my own creation.
• I've based them on the following Lucide icons:
• I've based them on the following design:

Naming

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

Design

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

Before Submitting

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

[github-actions]

Added or changed icons

Preview cohesion

Preview stroke widths

DPI Preview (24px)

Icon X-rays

[jguddas]

Do we have a standard plus and minus size, feels a bit big.

[ericfennis]

@jguddas I've based these ones on the plus-square icons.

[ericfennis]

The plus from file-plus is also an option.

100%

[karsa-mistmere]

I agree with @jguddas, the plus and minus signs feel a bit too large, almost all of our other *-plus icons use a 6 by 6 plus (other than a few outliers such as square-plus and circle-plus which have plenty of space to accommodate for larger signs, and calendar-plus that uses a tiny one):

[ericfennis]

@karsa-mistmere Sorry forgot to post an update on this.
Already added the smaller plus. The one that is selected in my previous post. That is the plus from the file icon.

[karsa-mistmere]

Maybe we should also decrease the plus size on shield-plus to match? 🤔

[ericfennis]

Yess, will do in a separate PR!