Add pdf parameters support

[tomasmcm]

There are some pdf parameters that can be appended to the pdf url to trigger specific actions: https://pdfobject.com/pdf/pdf_open_parameters_acro8.pdf

Not all parameters are supported in every browser. According to this answer (https://stackoverflow.com/a/7154043) Chrome supports view, zoom, page, toolbar and nameddest.

It would be great to know what parameters are supported in each browser.
Note that according to some answers I found, sometimes the parameters are only supported when loading the pdf inside an iframe or object tag.