Add p-breadcrumbs--large class to avoid upstream conflicts

[aaryanporwal]

Done

• Added a new breadcrumbs-large class to the breadcrumbs to avoid polluting vanilla classes.

Fixes [list issues/bugs if needed]

QA

1. Run the LXD-UI:
   • On the demo server via the link posted by @webteam-app below. This is only available for PRs created by collaborators of the repo. Ask @lorumic or @edlerd for access.
   • With a local copy of this branch, run as described here.
2. Perform the following QA steps:
   • Check all the breadcrumbs in detail pages look as they should be.

Screenshots

[if relevant, include a screenshot or screen capture]

[webteam-app]

Demo starting at https://lxd-ui-624.demos.haus

[mas-who]

LGTM.