Atrocity ships

[kestrel1110]

NOTICE: Delete the sections that do not apply to your PR, and fill out the section that does.
(You can open a PR to add or improve a section, if you find them lacking!)

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Content (Artwork / Missions / Jobs)

Summary

{{summarize your content! Include links to related issues, in-game screenshots, etc.}}

Save File

This save file can be used to play through the new mission content:
{{attach a save file that allows people to easily test your added mission content or see your new in-game art}}

Artwork Checklist

• I updated the copyright attributions, or decline to claim copyright of any assets produced or modified
• I created a PR to the endless-sky-assets repo with the necessary image, blend, and texture assets: {{insert PR link}}
• I created a PR to the endless-sky-high-dpi repo with the @2x versions of these art assets: {{insert PR link}}

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Bugfix: This PR addresses issue #{{insert number}}

Fix Details

{{add details}}

Testing Done

{{describe how you tested that the fix doesn't introduce other issues}}

Save File

This save file can be used to verify the bugfix. The bug will occur when using {{insert commit hash / version}}, and will not occur when using this branch's build.
{{attach a save file that can be used to verify your bugfix. It MUST have no plugin requirements}}

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Feature: This PR implements the feature request detailed and discussed in issue #{{insert number}}

Feature Details

{{add details about the feature you implemented}}

UI Screenshots

{{attach before + after screenshots of any changes to UI, or replace this line with "N/A"}}

Usage Examples

{{if this feature is used in the data files, provide examples!}}

Testing Done

{{describe how you tested the new feature}}

Automated Tests Added

{{describe the automated tests you added (using the unit-test framework, integration-test framework or otherwise) to reduce the risk of regressions in the future. "N/A" if this PR is not for an in-game feature that needs to remain functional in the future. }}

Performance Impact

{{describe any performance impact (positive or negative). "N/A" if no performance-critical code is changed. }}