Update decoupler

• add explosionPotential = 0.1
• update FX from 'activate' to 'decouple'
• adjust angular drag from 1.0 to 0.25
• add
  • stagingIcon = DECOUPLER_HOR
  • ejectionForcePercent = 100
  • fxGroupName = decouple
  • menuName = Decouple Top Node
  • stagingEnableText = #TBEE-decoup-enable
  • stagingDisableText = #TBEE-decoup-disable
  • menuName = #TBEE-decoup-menu