Use github.com/saracen/walker for file walk operations

In some local tests w/ a slowed down filesystem, this massively cut down
on the time to clean up a repository by ~3x, bringing a total 'publish
update' time from ~16s to ~13s.

Signed-off-by: Ryan Gonzalez <ryan.gonzalez@collabora.com>

Author: refi64

api/files.go

@@ -125,11 +125,7 @@ func apiFilesListFiles(c *gin.Context) {
 	listLock := &sync.Mutex{}
 	root := filepath.Join(context.UploadPath(), c.Params.ByName("dir"))
 
-	err := filepath.Walk(root, func(path string, _ os.FileInfo, err error) error {
-		if err != nil {
-			return err
-		}
-
+	err := walker.Walk(root, func(path string, info os.FileInfo) error {
 		if path == root {
 			return nil
 		}

go.mod

@@ -94,6 +94,9 @@ require (
 	golang.org/x/net v0.23.0 // indirect
 	golang.org/x/sync v0.3.0 // indirect
 	golang.org/x/text v0.14.0 // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/sync v0.3.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
 	gopkg.in/yaml.v3 v3.0.1 // indirect
 )