Dome interior updates

[jennuine]

🎉 New feature

Summary

• added interior dome models
• updated base ramp model (previously only half was shown)
• converted most textures from png to jpg

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
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[jennuine]

Is it just me or does <emissive_map> not provide any notable difference other than load time taking slightly longer?

garden_demo/garden_demo/models/Moon base dome/model.sdf

Line 363 in 6a686a7

<emissive_map>materials/textures/InnerDome_Emissive.jpg</emissive_map>

[iche033]

ouch, it's a bug. Can you give gazebosim/gz-rendering#723 a try?

[jennuine]

Much better thanks!

[jennuine]

This PR is ready for review now.

4a350c6 I moved the dome to it's own link so we can turn on/off transparency through the GUI. I thought it might be helpful for debugging features

[iche033]

I think we can remove flat_normal.jpg since it's not used any more.

Same for MoonHeightmap.jpg. I believe this is converted form the 16 bit MoonHeightmap.png image. I did not use the 16 bit version because I had issue loading it in gz sim. The Image class in gz-common floods the console with lots of out of range msg. So I ended up using the 8 bit version.

Other than that, this looks good to me