refactor: obj name mapping and internal path processing (#2733)

* refactor:Prepare to remove the get interface

* feat:add obj Unwarp interface

* refactor:obj name mapping and program internal path processing

* chore: fix typo

* feat: unwrap get

* fix: no use op.Get to get parent id

* fix: set the path uniformly

Co-authored-by: Noah Hsu <i@nn.ci>

drivers/s3/driver.go

@@ -57,11 +57,6 @@ func (d *S3) List(ctx context.Context, dir model.Obj, args model.ListArgs) ([]mo
 	return d.listV1(dir.GetPath())
 }
 
-//func (d *S3) Get(ctx context.Context, path string) (model.Obj, error) {
-//	// this is optional
-//	return nil, errs.NotImplement
-//}
-
 func (d *S3) Link(ctx context.Context, file model.Obj, args model.LinkArgs) (*model.Link, error) {
 	path := getKey(file.GetPath(), false)
 	disposition := fmt.Sprintf(`attachment;filename="%s"`, url.QueryEscape(stdpath.Base(path)))