Add the ability to create more point systems

[FranciscoG]

We have props and we have flow points.

Add a way to create new system of points.

creating

!pointsystem [name] [plural-name] [default icon]
example (hyphens get converted to spaces)
!pointsystem trippy trippy-points :cactus:

Then when creating triggers you can add this to the end:
+trippy
and it will say
@currentDJ now has 24 trippy points 🌵
or change the icon
+trippy=bird
@currentDJ now has 24 trippy points 🐦

editing a point system:

if a point system already exists it will change the other 2 items
change the default icon by doing this (remember to use the same plural-name or it will throw an error
!pointsystem trippy trippy-points :bird:

info

!pointsystem trippy will give you details about a system
it will return:
name: trippy
plural name: trippy points
default icon: 🌵

Deleting (tentative)

!deletepointsystem trippy
purposely long and annoying to type so it's not easy to do