Makes use of the newly introduced endpoint in src-cli. This is usually faster, and it means we can eventually have just one code path again.
I think this is good as-is and a net-improvement that we should get in, but before we can remove the old code path, we should have a conversation about the src batch repos command:
We cannot render the same output with the new resolver
Because the current output is incorrect. It doesn't consider workspaces, nor ignored repos or any potential overwrites by a later rule in the on: section
Hence I propose that we shift this to run a proper workspace resolution and just print that outcome, like we do in the UI.
