Changed the order in which the tanks/h2-o2 generators were filled, if tanks are found and tanks are filled, then h2-o2 generators are not touched (empty gas gens are performance friendly)

- NPC grids are updated in batches of 10 in subsequent ticks, this should spread the things a bit and reduce performance spiking with lots of NPC grids spawned in (during missions, sieges etc.)
- Added edge cases to skip thruster loop, if the ship is standing, and plans to do so

Forgotten comments

Altered behaviour for the NPC ships which are further than 10km away from players. Using direct matrix alteration instead of applying force on the grid in specific direction. This behaves much better regarding the grid's physics performance. The ships can move a bit janky, but hey, are the ship moving janky if there is no one around to see the jank?

help command updated

new attribute in the /npc spawn command, when spawning a specific prefab, you can add additional count attribute (this way, spawning 5 ships at once is simple). Tbh, this is mostly for me so I can easily spawn sets of ships for testing purposes, as I am a lazy f*ck.

just couple of tests with final rollback to original state, nothing has changed :)