Support swagger type format for global override

[Yavith]

Is your feature request related to a problem? Please describe.
I am trying to declare a global override in .swaggo to replace my custom date struct with the string swagger type using the date-time format

Describe the solution you'd like
The solution I would be along the lines of an additional formatting parameter after the type in the 'replace' function e.g.

replace src/types.NullTime string date-time

Describe alternatives you've considered
One workaround I've explored is to replace this type with another custom type with the correct swagger format:

type NullTimeSwagger struct {
	String *string `swaggertype:"string" format:"date-time"`
}

However, the generated doc places the date-time string inside a struct, which is undesirable.

[serious-snow]

hope same

type SFID int64

type GreeterReq struct {
	ID SFID `json:"id"`
}

The result I want is type:string, format: int64
I don't want to label every field that uses SFID, but I want to rewrite it through the interface, or--overrides Fileld