Support 'ignore newpage'

[dcendents]

Hi,

I'm working on a sequence diagram using the newpage instruction and the preview lets me browse through each diagram, very nice.

If I set the instruction ignore newpage at the top of the diagram, I get the error: Error found in diagram sequence numImage is too big = 0 which I suspect comes from the integration and not plantuml itself.

I can generate the diagram (single image) when running it locally with java or using the plantuml server online.
In vscode with local execution I get the error above, with server execution it return Error: 509 but as I said using the plantuml server I have no error.

Looking at the code it looks like you parse the diagram and count how many newpage statements there are (regNewPage = /^\s*newpage\b/i).
I think you could check for /^\s*ignore\s+newpage\b/i and if found then simply return 1 and ignore the newpage statements.

P.S.: I find while I work on a diagram it is easier to generate it in a single page, hence adding the ignore newpage while I work on it and then remove it, otherwise I have to comment all the newpage. It's not a big deal but would be easier.

Thanks,