Emit query method arg params struct

[jwc-clinnection]

Add configuration option "emit_methods_arg_with_struct" where if true, generated methods will always have struct argument even if number of arguments is 1. Defaults to false.

Example when emit_methods_arg_with_struct: false (default behavior):

const createBlog = `-- name: CreateBlog :one
insert into blog (name)
values ($1)
RETURNING id, name
`

func (q *Queries) CreateBlog(ctx context.Context, name string) (Blog, error) {
	row := q.db.QueryRow(ctx, createBlog, name)
	var i Blog
	err := row.Scan(&i.ID, &i.Name)
	return i, err
}

Example when emit_methods_arg_with_struct: true

const createBlog = `-- name: CreateBlog :one
insert into blog (name)
values ($1)
RETURNING id, name
`

type CreateBlogParams struct {
	Name string `json:"name"`
}

func (q *Queries) CreateBlog(ctx context.Context, arg CreateBlogParams) (Blog, error) {
	row := q.db.QueryRow(ctx, createBlog, arg.Name)
	var i Blog
	err := row.Scan(&i.ID, &i.Name)
	return i, err
}

[kyleconroy]

As usual, thanks for the pull request. This option isn't needed because we already have this functionality using the query_parameter_limit option. Setting this to 0 will always generate a struct.

https://play.sqlc.dev/p/e95df5c9a6b538ce5d55846d9dc0c1e4801521c8c4e987418863a34daeb86e57

[jwc-clinnection]

Thank you!