feat(openAPI-union) Add type support for unions with additionalProperties to provide ts intellisense

[remy90]

Thank you for your work on this package, much appreciated! I came across string & {} recently to get 'loose autocomplete' on a string and thought it might help here.

Changes

What does this PR change? Link to any related issue(s).
A union of type "A" | "B" | "C" will now provide intellisense options from the union but also accept non-union string entries

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Checklist

• Unit tests updated
• docs/ updated (if necessary)
• pnpm run update:examples run (only applicable for openapi-typescript)

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[remy90]

Hey @drwpow @gzm0
Any chance of a review on this? openapi has served me well on a recent project and I wanted to give back in a small way. LMK if you have any thoughts!

[drwpow]

Thanks for submitting this! Sorry for the delay in reviewing. There’s a slight conflict with another PR that recently got merged. If you’re able to resolve the conflict, and tests are still passing, would be happy to merge, thank you!

Also please be sure to add a changeset (see comment) so this can be versioned & released