First pass at fully-equipped character builder

Character Builder v3 now takes in a user-provided
inventory, allows the user to set equipment from
said inventory, and then applies equipment mods
to stats. Inventory weight also influences character
evade (it needs to also influence 'movement').

There is a set of stats we can call "Combat Profile"
which includes things like "ATK PWR", which represents
a character's raw attack strength (derived from their
MGT score) plus whatever base power and scaling their
equipped weapon brings.

This is a cool milestone but far FAR from done. Still
no error-checking or tests. Probably bugs out the yin
yang. Docs are woefully out of date / incomplete. Would
love to keep going but I am tired and in Mexico. Will
continue later.