[WIP] Add autoderivation support for literal types

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

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This section details on the original issue you should resolve

<issue_title>Autoderivation for literal types</issue_title>
<issue_description>Would be neat to support these in path/query/forms.

E.g. param["a" | "b"] in path instead of an enum.

And queryParams[(status: 1 | 2 | 3)]
</issue_description>

<agent_instructions>Copy approach from tupson sake92/tupson#13</agent_instructions>

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