Add scripts to synchronize old schemes

[wzshiming]

Fixes #33
Fixes #10

/cc @tjungblu @siyuanfoundation

[siyuanfoundation]

Thanks @wzshiming for adding this script. Can you add instructions in the README file explaining how to use it, and how it works? Thanks!

[siyuanfoundation]

I find shell scripts generally not flexible. There could be api files not necessarily follow this exact pattern. I think go scripts with more string manipulation function would be more flexible. WDYT?

[wzshiming]

Yes, I changed it a little, it looks a little better but not much, this hard code can't be avoided. 😄

[wzshiming]

Thanks @wzshiming for adding this script. Can you add instructions in the README file explaining how to use it, and how it works? Thanks!

Of course, How to update the scheme that has been added to the readme

and it should already be enabled by this PR for cmd, I'm not sure how to describe it better because it's so simple.

https://github.com/etcd-io/auger/blob/4389cfd9abed97c2745d89f1c34e35f274db8811/cmd/init.go

import (
	oldscheme "github.com/etcd-io/auger/pkg/old/scheme"
	"github.com/etcd-io/auger/pkg/scheme"
)

func init() {
	oldscheme.AddToScheme(scheme.Scheme)
}

[wzshiming]

This is the same as pkg/scheme/scheme.go