Add an output flag for local bundle create

[UncleGedd]

Description

Today we do a uds create -o to output an OCI registry, let's also ensure we can do this for local directories

[UncleGedd]

Discussed with @TristanHoladay :

• if the -o file path doesn't exist we should create the path (just like in Zarf)
• we can use a heuristic to determine if the -o string is a URL or local path (could use helpers.IsDir() and/or url.Parse() from the net/url pkg)