Feature reqeust: Add reactive docking available for every ship.

[flywlyx]

The position defense was added to the carrier, there’s no longer any need to keep the reactive docking as a unique function, since the carrier now has another distinct feature.

This change offers the following benefits:
1. Carrier subordinates can remain undocked at all times, and players won’t be forced to use the position defense function just to keep them undocked.
2. Miners and traders’ escorts won’t need to stay 100 km away from them constantly.
3. Trader ships assigned to resupply ships won’t be left lingering as vulnerable targets.