Replace calls to NativePath.toString() with .name ...

This has been deprecated in vibe-core and only triggers with 'library-nonet'.

Enable exact search for maven registry provider

Increased maven http timeout

Don't catch failed metadata requests with a Json(null) object

Update registry URL + test payload

Update package dependency URL

use single api request to fill metadata cache for all dependencies ...

- avoids various RTTs and possible failures

Use new minimized API endpoint for package queries

Merge remote-tracking branch 'upstream/stable' into merge_stable

avoid using failing fallback package suppliers for 10 minutes ...

- still keep retrying primary package supplier

improve package supplier fallback logic ...

- scope (failure) did swallow fatal errors
- improve logging of failures and successes
- rethrow failure of default registry instead of from the last one
- remove failing package suppliers, so we don't keep beating dead horses

Note that some retry logic is already done interally by package suppliers,
so a failing one is unlikely to recover on the next usage.

Filesystem package supplier updated

Retry download for registry search packages

Refactor retry download

Split-up package suppliers into individual modules