What DID MERCY DO SO WRONG TO THESE Devs

[Etok-2200]

my rework idea:

@Etok-2200

mercy uses pistol and staff at same time
details:

• left hand holds staff right hand holds pistol
• weapon swap keybind now changes beam (boost/heal)
• boost, heal, and pistol damage numbers adjusted to place mercy in not overpowered state