add some gene details on the variant page

[JMdeSteAgathe]

hi,
I would love to have some condensed gene informations on the variant page (in the gene line of the "nomenclatures" paragraph?)

• loeuf coloring
• omim disease flag,
• panelapp flag

For example:
$\textcolor{red}{\textsf{KAT6A}}$ (🔺disease in omim, panelapp)
$\textcolor{orange}{\textsf{GJD2}}$ (no disease in omim, panelapp)