go(BREAKING)!: use messager-level options for Load func in Messager interface

[wenchy]

Related PRs

• Go: load(options): support both global-level and messager-level options, and add new option LoadFunc
• Go: load: add LoadMessagerInDir for clean code

❗BREAKING CHANGE

type Messager interface {
	Load(dir string, fmt format.Format, options ...load.Option) error
	...
}

Changed to

type Messager interface {
	Load(dir string, fmt format.Format, opts *load.MessagerOptions) error
	...
}

Compatibility resolution

If you call Load with load.Option before, then you need to pass the load.MessagerOptions struct instead.