refactor: collapse pkg/vfs/ → root for clean import path

Subsystem code lives in package vfs at repo root. Importers now use
`github.com/hanzoai/vfs` (no /pkg/vfs/ nesting). Standalone shim moved
to cmd/vfs/ where applicable.

Per Hanzo Go-stdlib pattern: repo IS the package.

cmd/vfs/main.go

@@ -17,7 +17,7 @@ import (
 	_ "github.com/hanzoai/vfs/pkg/backend/file" // registers file://
 	_ "github.com/hanzoai/vfs/pkg/backend/s3"   // registers s3://
 	"github.com/hanzoai/vfs/pkg/mount"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 
 	"github.com/luxfi/age"
 )

cmd/vfsd/main.go

@@ -28,7 +28,7 @@ import (
 	"github.com/hanzoai/vfs/pkg/backend"
 	_ "github.com/hanzoai/vfs/pkg/backend/file"
 	_ "github.com/hanzoai/vfs/pkg/backend/s3"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 	"github.com/hanzoai/zip"
 	"github.com/hanzoai/zip/middleware"
 )

fs_test.go

@@ -13,7 +13,7 @@ import (
 
 	"github.com/hanzoai/vfs/pkg/backend"
 	_ "github.com/hanzoai/vfs/pkg/backend/file"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 func newFS(t *testing.T) *vfs.FS {

mount.go

@@ -4,7 +4,7 @@
 //
 // Wire shape:
 //
-//	import _ "github.com/hanzoai/vfs/pkg/vfs"  // init() registers
+//	import _ "github.com/hanzoai/vfs"  // init() registers
 //
 // VFS has no public HTTP surface today — it's an S3-backed virtual
 // block filesystem driven through FUSE mounts and CLI/sidecar usage.
@@ -34,7 +34,7 @@ import (
 )
 
 // Version is overridden at build time via -ldflags
-// "-X github.com/hanzoai/vfs/pkg/vfs.Version=...".
+// "-X github.com/hanzoai/vfs.Version=...".
 var Version = "dev"
 
 // mountedInstance is the VFS handle the HTTP routes operate against.

mount_test.go

@@ -15,7 +15,7 @@ import (
 	"github.com/hanzoai/cloud/pkg/cloud"
 	"github.com/hanzoai/vfs/pkg/backend"
 	_ "github.com/hanzoai/vfs/pkg/backend/file"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 	"github.com/hanzoai/zip"
 )
 

pkg/mount/fuse_darwin.go

@@ -23,7 +23,7 @@ import (
 	"github.com/jacobsa/fuse/fuseops"
 	"github.com/jacobsa/fuse/fuseutil"
 
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 // Mount mounts the given *vfs.FS at mountpoint and serves until the

pkg/mount/fuse_sqlite_test.go

@@ -33,7 +33,7 @@ import (
 	"github.com/hanzoai/vfs/pkg/backend"
 	_ "github.com/hanzoai/vfs/pkg/backend/file"
 	"github.com/hanzoai/vfs/pkg/mount"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 func TestFUSESQLite(t *testing.T) {

pkg/mount/fuse_stub.go

@@ -9,7 +9,7 @@ import (
 	"context"
 	"fmt"
 
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 // Mount returns a build-tag error. Build with `-tags fuse` to enable.

pkg/mount/fuse_unix.go

@@ -26,7 +26,7 @@ import (
 	"bazil.org/fuse"
 	bzfs "bazil.org/fuse/fs"
 
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 // Mount mounts the given *vfs.FS at mountpoint and serves until the

sqlite_test.go

@@ -40,7 +40,7 @@ import (
 
 	"github.com/hanzoai/vfs/pkg/backend"
 	_ "github.com/hanzoai/vfs/pkg/backend/file"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 func TestSQLiteRoundTrip(t *testing.T) {

vfs_test.go

@@ -9,7 +9,7 @@ import (
 
 	"github.com/hanzoai/vfs/pkg/backend"
 	_ "github.com/hanzoai/vfs/pkg/backend/file"
-	"github.com/hanzoai/vfs/pkg/vfs"
+	"github.com/hanzoai/vfs"
 )
 
 func newRoundTripVFS(t *testing.T) *vfs.VFS {