Add support to change orientation of pages

[KramKroc]

Is your feature request related to a problem? Please describe.

Pages like a cover and copyright could likely be aligned as portrait while data heavy tables may suit being added on a landscape page.

Describe the solution you'd like

I see there is an issue already raised to add a new page/page break. It would be useful if this were updated with optional field to indicate orientation.

Describe alternatives you've considered

[johnfercher]

This would be set as page style on AddPage in maroto v2.

[johnfercher]

Tried to implement this. But gofpdf doesn't support the change of page orientation after the creation of the gofpdf instance. A way to do that would be create a gofpdf instance to each orientation changing, run them and after merge the PDFs.

[jerbob92]

@johnfercher Isn't that what AddPageFormat is for?

[johnfercher]

I will check it. I didn't know the existence of this method. Thank you