Formatter request: sort methods

[hsblhsn]

Hi @daixiang0,
Can you build a project to sort methods of a struct or interface?

type a struct{}

func (*a) C(){}
func (*a) D(){}
func (*a) A(){}
func (*a) B(){}
func (*a) Y(){}

this code should be

type a struct{}

func (*a) A(){}
func (*a) B(){}
func (*a) C(){}
func (*a) D(){}
func (*a) Y(){}

Thank you!

[daixiang0]

Thanks for your input, it is not in my plan but if anyone is interested in it and posts a PR, I am happy to review it.