[Feature] Shift to pause terminal view movement

[michaeldoylecs]

GTNewHorizons/GT-New-Horizons-Modpack#18420

See GTNewHorizons/Applied-Energistics-2-Unofficial#652 for the AE2-Unofficial related PR.

This is my attempt to reimplement #188, which was reverted in #206.

While the player is holding shift, the FluidRepo/EssentiaRepo enters a paused state. When paused, instead of clearing the view and display buffers entirely and filling them from the server entries, the existing view buffer is maintained and the existing view items are updated from the server entries. Any items that were not previously in the view are appended to the end of the view. Sorting is disabled while paused.

I have tested this on the world provided in the original reversion, but I would love some massively updating AE2 systems to test performance on, as well as any advice on how to go about testing ae2 performance outside of monitoring MSPT. I haven't run into any noticeable FPS TPS issues in my testing, but since the previous attempt had to be reverted I would love addition eyes.

I am not familiar with how to handle the dependency on AE2-Unofficial updating that this PR depends on, so advice is needed.

[Caedis]

That should get it building unless you dep on any of the changes in the ae2 pr

[michaeldoylecs]

There are dependencies. The implementation depends on changes to IDisplayRepo in AE2-Unofficial.

[Caedis]

Gotcha, then this will have to wait for that pr