Progressively get rid of `{eval-rst}` blocks

[astrojuanlu]

After we migrated our docs to MyST (#1073 and others) we left several {eval-rst} blocks here and there, which are a way to keep reST features that are unsupported in MyST. We should progressively get rid of them, and if there are any remaining features that are unsupported, link to the corresponding https://github.com/executablebooks/MyST-Parser/ issue.

[DhruvSondhi]

This would be nice to migrate as it will remove all dependence on .rst

[brivadeneira]

Hello there,

can I contribute solving this issue?

[astrojuanlu]

Hello @brivadeneira , sure! ☺️ Start with a small pull request, maybe modifying only one file, and we'll see from there.

[brivadeneira]

Hello @brivadeneira , sure! relaxed Start with a small pull request, maybe modifying only one file, and we'll see from there.

https://github.com/poliastro/poliastro/pull/1330

[astrojuanlu]

#1330 was merged! @brivadeneira you're welcome to keep working on this issue :) If other readers come by and want to help, make sure you read #1330 to see what is expected for this work.