Frogbot to work with Backstage Yarn Plugin

Is your feature request related to a problem? Please describe.
We use the backstage yarn plugin to resolve all our backstage dependencies to keep it updated easier however, and I don't think this is an issue per-se but lack of functionality, as the backstage yarn plugin replaces all the dependencies automagically with backstage:^ frogbot fails to resolve them properly:

npm ERR! code EUNSUPPORTEDPROTOCOL
npm ERR! Unsupported URL Type "backstage:": backstage:^
npm ERR! A complete log of this run can be found in: /root/.npm/_logs/2025-05-08T07_26_36_629Z-debug-0.log
target '/tmp/jfrog.cli.temp.-1746689167-3720575895/plugins/homepage-useful-links [npm]' errors:
failed to build dependency tree: failed while building 'npm' dependency tree: error while running '/usr/local/bin/npm install --ignore-scripts --package-lock-only': exit status 1

Describe the solution you'd like to see
Would be nice if this could work with the backstage yarn plugin added!

Describe alternatives you've considered
N/A

Additional context
Snyk had a similar issue and this one but it was resolved, but still doesn't seem to work for us 😢

LMK if this should be a bug instead of a feature, but I think its just something to do with some functionality with yarn and how it builds the dependencies. (its a bit magical to me)

Happy to contribute this as well if some guidance is given on what needs to happen!

Thanks!

Start by reproducing the failure in the npm dependency-tree build with a project using Backstage's Yarn plugin and the backstage:^ protocol. Review the Backstage Yarn plugin and linked Snyk references, then trace how Frogbot invokes npm install --ignore-scripts --package-lock-only. Done means Frogbot can resolve the dependencies and complete the scan without the unsupported-protocol error.