Being able to pass custom attributes to elements to be used in custom Writers

[maayanb180]

Is your feature request related to a problem? Please describe.
I've developed several custom Writers for the itext API. The problem is that I'd like to be able to have my own custom parameters, so I will have full control on settings that are not a part of PDF.

For example - being able to have the MS Word "Style" for a Paragraph.

Describe the solution you'd like
Adding a map of custom parameters to all elements that is filled during the SAX parsing, and saved in the Element objects.

Describe alternatives you've considered
Today, I use specific colors as hints to my writers (for example, color "#d3a4a5" is "Heading1", and so on...). it works, but I don't like this approach.

Your real name
Maayan

Additional context