virgilhq 0.3.1 — bare-arg scan target

Drop the `--url` ceremony for the common case. `virgil scan` now auto-detects whether the positional argument is a local path or a remote repo:

```
virgil scan . # local
virgil scan https://github.com/x/y # remote, full URL
virgil scan github.com/x/y # remote, bare host
virgil scan x/y # remote, GitHub shorthand
```

The `x/y` shorthand only kicks in when no local directory of that name exists, so it can't silently hijack a literal relative path. `--url` still works for back-compat.

14 unit tests pin the resolver branches.