Advanced Rocketry - Reworked

Changelog 2.2.8
- Nuclear rocket gating:
  - Fixed station-return softlock for stations orbiting gated planets.
    - Added `nuclearRocketsRequireArtifactForGatedStations` config.
      - Default: `false` — stations are exempt, under the notion that one would have to have used the artifact to move station there, and it's probably now sitting in the WarpController.artifact-tab..
      - `true` — strict multiplayer option: require artifacts for gated stations too.
- Langfile:
  - fixed 1 missing entry + small cleanups