refactor(gatsby-theme-code-recipes): convert to typescript

[velein]

Part of #668

Converts gatsby-theme-code-recipes to Typescript. I've double checked if this running correctly on docs (docs are using this package as dependency)

Might be a good idea to make additional tweaks by adding strict: true and type any props. I can try add that if you don't have anything against it.

[mxstbr]

Might be a good idea to make additional tweaks by adding strict: true and type any props. I can try add that if you don't have anything against it.

Yes please!! 🙏

[velein]

Done @mxstbr
BTW sorry I've mistakenly set Brent as a reviewer and cannot add you now 🤦‍♂

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[lachlanjc]

Thank you for your contribution here! This package has since been removed from Theme UI—I’m sorry this waited so long with such an unfulfilling finish, but we’d absolutely welcome other contributions. <3