Immersive Engineering Turret Improvement

Currently this mod make these improvements to BluSunrize's Immersive Engineering's turrets:

- Allow IE's damage types to bypass invulnerability timer:

Before you would have 10 turrets shooting at something without making much headway because bullets are wasted hitting a target that is already invulnerable. This change makes it so stacking turrets actually work, allowing them to scale with harder content and rewarding those who manage to get such a system up and running. To quote a fellow Texan engineer: "Use a gun. And if that don't work, use more gun."

This change also affects Tesla Coil. Chemthrower Turret however is unchanged due to a majority of their damage (if any) coming from liquids and status effects, which likely requires a fundamental system change which is not in the scope of this mod. If the need arises you can use a mod/datapack that disables iframe altogether or for those damage types instead.

- Make turrets a bit more lively

Turrets now have idle rotation and show a clear deactivated state when not monitoring an area. This change does not have any gameplay impact and is a pure visual thing, though it does make configuring them a bit easier.

This also fixes an occasional visual bug where turrets would do a full circle unwind back to their default rotation after losing target.