Better Plot Roles

PlotSquared Feature Suggestion:

Player based role system for plots

How should it be implemented?

Instead of default roles (member and trusted) there should be other roles too. Players must be able to create those roles. (Something like per plot roles) These roles need to have flags like placing blocks, using redstone, flying, breaking blocks, opening chests, opening doors, attacking animals or monsters, trading with villagers. Also, those flags must be editable by players.

Additional context

I know this would be a substantial change but surely, I am not the only one having problems with plot roles. These improvements would be helpful for survival, skyblock, faction servers.
Also, I'm sorry about my English, I'm still learning.
Checklist:

• I made sure there are no duplicates of my suggestion (Use search)
• I made sure my suggestion does not exist yet (Check the wiki)
• I made sure my suggestion is useful for the majority of PlotSquared users

No files, tests, or entry points are named. Start by locating the existing plot role system and its member/trusted permissions, then review how plot flags are represented and edited. Done would require a defined design and implementation for player-created roles, editable permissions, and coverage for the listed actions.