Collection: useful Playdate projects in Rust (🦀)

[boozook]

Please confirm this pull request meets the following requirements:

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• Curating a new topic or collection
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Curating a new collection

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Collection of links, crates, tools and other projects that could be helpful to make game for Playdate gaming console in Rust programming language. I would love to curate this list. ❤️‍🔥

[ahpook]

LGTM - in general we like for these links to be github repos but it is OK to have external URLs if there is not an exact match for them.