feat(Tau): Add Tau stuff from PA: The Greater Good (BSData#6753)

* fix: Tau Tactical Drones power level modifiers

Tau part of BSData#6711

* pub(Tau): add PA:TGG publication

* feat(Tau): Update Shadowsun for PA:TGG

* feat(Tau): Add custom Sept Tenet rules

* fix(Tau): Add pulse pistol to Shadowsun

* feat(Tau): Add Prototype Weapons Systems from PA:TGG

* feat(Tau): Add pre-battle stratagems from PA:TGG

* feat(Tau): Update The Eight to PA:TGG datasheet

* feat(Tau): Veteran Cadre stratagem for FE from PA:TGG

* feat(Tau): Add Warlord Traits for FE from PA:TGG

* fix(Tau): Corrected Prototype Weapons Systems limits