Completely move FE support to an ExternalPowerManager, removing the special case

[coderbot16]

This PR resolves the hardcoding issue present in the previous PR in regards to FE support, and makes FE support done completely through ExternalPowerSystems. Also, TR blocks can be configured to not charge FE items, but this has the side effect of not charging TR items since they don't support EU yet.

General list of changes:

• ExternalPowerManager API modified; passes EnumFacing to isPoweredTile query, adds item to item transfer
  • Note: This means that TechReborn-ModCompatibility will need to be updated since these are breaking API changes
• FE support fully moved to an ExternalPowerManager with RebornRegistry
• Uses of getCapability(CapabilityEnergy.ENERGY) replaced with ForgePowerItemManager in StackInfoHUD and ItemUtils

[modmuss50]

I think this makes more sense, thanks.

[coderbot16]

Sounds good, you're welcome! I'll fix up TechReborn-ModCompatibility now to adapt to the new API changes.