cmd/vserver registered via cli.RegisterService(VServerCmd) but was never
imported, so `grn vserver` did not appear. Uncomment the blank import so the
package init() runs and the service mounts.

Verified: `grn --help` now lists `vserver`; `grn vserver --help` shows all 8
subcommands; full test suite passes.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Route reviews of cmd/vserver, internal/vserverclient, and docs/commands/vserver
to the vserver team.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

go test on macos-latest with Go 1.22 aborted with "missing LC_UUID load
command": the internal linker omits LC_UUID and recent macOS dyld rejects such
binaries. Build/run (CGO_ENABLED=0) is unaffected; only test binaries crash.
Run tests with CGO_ENABLED=1 -ldflags=-linkmode=external (system cc is present
on ubuntu and macos runners).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

…ags, floating IPs, and interfaces, alongside utility enhancements.

# Conflicts:
#	docs/commands/vserver/index.md
#	docs/commands/vserver/server.md
#	go/cmd/register.go
#	go/cmd/vserver/flavor/flavor.go
#	go/cmd/vserver/flavor/helpers.go
#	go/cmd/vserver/image/image.go
#	go/cmd/vserver/secgroup/delete.go
#	go/cmd/vserver/secgroup/rule/delete.go
#	go/cmd/vserver/secgroup/rule/rule.go
#	go/cmd/vserver/secgroup/secgroup.go
#	go/cmd/vserver/server/delete.go
#	go/cmd/vserver/server/helpers.go
#	go/cmd/vserver/server/reboot.go
#	go/cmd/vserver/server/server.go
#	go/cmd/vserver/server/stop.go
#	go/cmd/vserver/subnet/delete.go
#	go/cmd/vserver/subnet/subnet.go
#	go/cmd/vserver/volume/delete.go
#	go/cmd/vserver/volume/volume.go
#	go/cmd/vserver/volumetype/volumetype.go
#	go/cmd/vserver/vpc/delete.go
#	go/cmd/vserver/vpc/vpc.go
#	go/cmd/vserver/vserver.go
#	go/internal/client/client.go
#	go/internal/formatter/formatter.go
#	go/internal/vserverclient/client.go
#	go/internal/vserverclient/complete.go
#	mkdocs.yml

…uce `resolveOutput` helper for output resolution in server commands