Upgrade Backstage Dependencies + Add New Backend System Support

[alecjacobs5401]

This likely may need to be split into multiple issues (and PRs), but it would be great to get dependencies updates for this plugin and have New Backend System support.

As it stands, this repo is also subject to GHSA-fpw7-j2hg-69v5

If I were to contribute Pull Requests, would they get any attention?