Add getAsType(Class<Archive<?>> archiveType, ArchivePath)

We shouldn't require users to specify an ArchiveFormat for Archive.getAsType. This, in the large majority of cases, can be inferred from the Archive type passed in (for instance, WebArchive.class generally means ArchiveFormat.ZIP).

Add to the META-INF/services files for each archive type the default archive format, and use this in a getAsType(Class<Archive<?>> archiveType, ArchivePath path) method to delegate to the already in-place getAsType(Class<Archive<?>> archiveType, ArchivePath path, ArchiveFormat format)