Code maintenance/55267 replace webfonts generator package and add missing icons

[dominic-braeunlein]

https://community.openproject.org/work_packages/55267

• Uses NPM package: webfonts-generator-casaper instead of @vusion/webfonts-generator to avoid problems with the current package, which adds extra space on the right.
• Adds missing icons

@Kharonus Is there a way to check if the added icons behave correctly?

[Kharonus]

Smoke testing the most common views, out of my head:

• left side menu
• landing page
• admin overview
• work package details all tabs