Tag plus & Tag minus

[SidonieBouthors]

Add tag-plus and tag-minus

Fixes #1240

Icon name

tag-plus, tag-minus

Use cases

Tags are used in variety of products to classify stuffs, adding and removing tags is quite a common operation, thus might be interesting

Design ideas

just like other IconCubePlus, or IconFlagMinus

Checklist

• [x] I have searched if someone has submitted a similar issue before and there weren't any. (Please make sure to also search closed issues, as this issue might already have been resolved.)
• [x] I have searched existing icons to make sure it does not already exist and I didn't find any.
• [x] I am not requesting a brand logo and the art is not protected by copyright.
• [x] I have provided appropriate use cases for the icon(s) requested.