tailscale: update tailfs file and package names (#11590)

This change updates the tailfs file and package names to their new
naming convention.

Updates #tailscale/corp#16827

Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>

drive/local.go

@@ -0,0 +1,37 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+// Package drive provides a filesystem that allows sharing folders between
+// Tailscale nodes using WebDAV. The actual implementation of the core drive
+// functionality lives in package driveimpl. These packages are separated to
+// allow users of drive to refer to the interfaces without having a hard
+// dependency on drive, so that programs which don't actually use drive can
+// avoid its transitive dependencies.
+package drive
+
+import (
+	"net"
+	"net/http"
+)
+
+// Remote represents a remote TailFS node.
+type Remote struct {
+	Name      string
+	URL       string
+	Available func() bool
+}
+
+// FileSystemForLocal is the TailFS filesystem exposed to local clients. It
+// provides a unified WebDAV interface to remote TailFS shares on other nodes.
+type FileSystemForLocal interface {
+	// HandleConn handles connections from local WebDAV clients
+	HandleConn(conn net.Conn, remoteAddr net.Addr) error
+
+	// SetRemotes sets the complete set of remotes on the given tailnet domain
+	// using a map of name -> url. If transport is specified, that transport
+	// will be used to connect to these remotes.
+	SetRemotes(domain string, remotes []*Remote, transport http.RoundTripper)
+
+	// Close() stops serving the WebDAV content
+	Close() error
+}