Update v0.16

[h2] New [/h2] [list] [*] I've added new pirate ships that will present a greater challenge. They are stronger, faster, and move in larger groups—so stay alert! [*] You can now encounter various collectible nebulae in different sectors. These nebulae contain valuable resources that you can harvest with the right equipment. [*] New planets and moons have been added to the game, enhancing the visual diversity and atmosphere of the galaxy. [/list] [h2] Update [/h2] [list] [*] Space stations now appear more frequently in sectors. This gives you more opportunities to restock or trade without having to search for a station for too long. [*] Research costs have been rebalanced. This adjustment ensures a fairer and smoother progression without disrupting the gameplay flow. [/list]