Add Boostrap Icons library to the list of available icon sets

I prepared a fix for this issue in the MR https://git.drupalcode.org/project/bootstrap/-/merge_requests/56 - please review.

Attach a static patch file with the fix to make it possible to use in composer in a safe way until 🐛 GitLab Merge Requests Unable to Generate Incremental Patch Files Active is resolved.

Cleaned up changes from another issue in the patch, attaching a fixed version.

Added a link to the Bootstrap Icons CDN to automatically load icons without manual including of the CSS.

Attach a static patch file with the fix to make it possible to use in composer in a safe way until 🐛 GitLab Merge Requests Unable to Generate Incremental Patch Files Active is resolved.