chore(types): add image url to planet type

[fabio-nettis]

Description

This PR adds the imageUrl property to the Planet type. This field contains a link to a webp containg the planets texture when viewed on the galactic map as celestial body.

Type of change

• Refractor (non-breaking change which cleans up code)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[github-actions]

Thank you for contributing to the HellHub SDK fellow Helldiver! We try to keep our bundle size as small as possible, here you can see the impact of your pull request to the main bundle.

📦 Main	🚀 PR	📁 Generated Files
4 kB	4 kB	index.mjs / index.d.ts

The difference between the current bundle and the one generated for your pull request is: 0 kB. Keep in mind that this is just an estimation and the actual difference might be smaller due to compression.