refactor: remove axios dependency

[adamdehaven]

Summary

Addresses #817 by emulating Axios typings for our implementation of useRequest so that we can remove Axios as a dependency and peerDependency.

Unsure if we want to go this route.

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PR Checklist

• [x] Does not introduce dependencies
• [x] Functional: all changes do not break existing APIs and if so, bump major version.
• [x] Tests pass: check the output of yarn test packages/<Kongponent>
• [x] Naming: the files and the method and prop variables use the same naming conventions as other Kongponents
• [x] Framework style: abides by the essential rules in Vue's style guide
• [x] Cleanliness: does not have formatting issues, unused code (e.g., console.logs), or leftover comments
• [ ] Docs: includes a technically accurate README, uses JSDOC where appropriate

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