Consider supporting more icon sets

:clipboard: **Description**

Hello, thank you everyone for your work on this awesome project!

Sorry if this is a duplicate (I don't think it is), I searched the issues and discussions but didn't find other threads specific to my question (only other more specific or just different discussions)

Has the idea of including more icon sets been discussed *more broadly*? :thinking:

`simple-icons` seems to only include icons for advertising the company products and services used for a project, and lack anything else beyond that. There are many interesting [icon projects](https://github.com/topics/icons) with *generic* icons that can be used for anything in a project's README! 😊

e.g. Feather includes [boxes](https://feathericons.com/?query=box) (packages, gift=donation, etc), a git branch/commit/PR icon, maybe `alert-circle` can be used for issues, etc.

In the meantime, i.e. `shield`'s [GitHub issue custom search in repo](https://shields.io/badges/git-hub-issue-custom-search-in-repo) just puts the word `query` in the badge, and the `flat` GitHub stars badge just says `stars` instead of i.e. a simple general star icon (and relevant emojis, if there is one for each case, don't always look good)

I know that one can add the base64 of a custom icon, but getting manually the base64 is not the best UX 😕

To be clear, I'm not proposing to accept request for custom icons etc, just to include a couple of more icon sets that would include more expressive icons than company logos.

Thank you for hearing me out!

The issue names no repository file, test, or entry point. Start by defining which additional icon sets and badge use cases are in scope; done would require an agreed implementation and verification path.

Written by the indexing model from the issue text.