feat: Overloaded types for serialize()

[ibgreen]

Lost some time

• before I realized that only the string variant of deserialize() accepts a filter rectangle.
• Figuring out what type of data was returned based on input types.

Typescript overloading allows us to ensure return value types match input types, and looks like typedocs also generates separate entry for each overload.

https://www.tutorialsteacher.com/typescript/function-overloading

Only supporting rect for http range requests seems like an unnecessary restriction, why not implement the filtering for all variants (even if we parse the library could avoiding calling callbacks for features outside an area of interest)

[bjornharrtell]

Seems sensible. I agree that rect filtering would make sense to be supported by all sources but I haven't had the need myself yet.

[ibgreen]

@bjornharrtell Fixed the prettier issue, but looks like you need to approve the CI runs after each update, not just once for the PR?

[bjornharrtell]

@ibgreen thanks for the contribution!