[WIP] Update README to include paper information and contact details

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

Original prompt

in the readme just mention this is official reposoty for the paper
\title{Mind the Gaps: A Curated Benchmark for Form Field Detection}

under the title author list i n the middle .

We upload data and checkpioints soon ..

put for contact in the readme at the end iheb from here:

\author{
Iheb Brini\inst{1}\orcidID{0000-0003-2326-4669} \and
Omar Moured\inst{2}\orcidID{0000-0003-4227-8417} \and
Hamza Gbada\inst{3}\orcidID{3333-3333-3333-3333} \and
Elisa Barney\inst{1}\orcidID{0000-0003-2039-3844}
}