Already possible. We call that fully specified symbol. Just add the fields you want to the symbol at symbol design time. (Meaning the footprint, electrical parameters, order info, house part number, whatever you desire)
Write protection is not so simple. (Only possible at a per library basis using operating system protections.) Currently not possible at all once placed in the schematic. (relies a bit on self discipline.)
Grouping is simple by either using keywords or a common prefix. And of course by putting similar things in the same library.
How to make such a fully specified symbol is described in my tutorial Tutorial: How to make a symbol (KiCad v5.1.x)