0.15.2 "Era'lgin'bl" update

This is an unstable update. New content may contain bugs.

Changelog:

- Major Changes

  - **Reduced Archon health and shield by yet another 90%**

  - Reduced Drak distance from 1000 to 750 in preparation for an upcoming remake of the faction

  - **Added the Kaltheim as a faction, alongside appropriate ships and outfits**

    - Encounterable from 275 LY and beyond

- Component Changes

- Ship Changes

  - Added the Fetri'sei to the Ka'het

  - Given the Korath Sestor ships their unabbreviated names

  - Added Korath Piercer Launcher to some Sestor 1vet builds

  - Added Bombardment Cannon / Turret to Coalition 2vet builds

  - Increased engine slot count of Heliarch Hunter

  - Added more engine components to Heliarch Hunter builds

- Tech Changes

  - Reduced Vareti'het research cost from 80 to 75

- Other Changes

  - Fixed an issue where the deep space scanner mission interferes with special ship encounter missions

    - Bug reported by Discord user aurora_7137

  - Fixed an issue where the deep space scanner mission breaks when defeating enemies at a node

    - Updated StartCondition from ArrivedAtStar to NewStarExplored

  - (tentatively) Fixed an issue where the friendly Merchant starbase mission does not activate correctly

  - Increased the image quality of Stack Core, Quantum Shield Generator, Heliarch Overclocked Shields, Large Co-generator, and S-970 Regenerator

    - Images sourced from Endless Sky High DPI