Make eligible enums convertable to static strs

[SleeplessOne1917]

I figure it's a good thing to avoid heap allocations where possible. Strum makes this easy for enums, allowing us to convert them to static string slices. It will also be helpful for the leptos ui since I'm using types from api common.

[SleeplessOne1917]

Stuff from strum_macros can be imported from strum when the "derive" feature is included. This makes the strum_macros import redundant.

[dessalines]

Seems fine. I'll test this out to make sure the generated types for lemmy-js-client don't change.

Also need to run

cargo +nightly fmt

[Nutomic]

Can you show an from your leptos-ui code to see how this is helpful?

[SleeplessOne1917]

I was originally thinking it would be useful for inserting values into query params, although it turns out both arguments for that need to be Strings.

I do anticipate I'll need to use ParamsMap::get and ParamsMap::remove at some point in the future though, so it will be helpful there.

At the very least, I think removing the redundant import will be helpful, and adding another derive trait doesn't add much (if any) complexity and will be useful to anyone else who uses lemmy_api_common in my opinion.

I can undo the derives if you feel it necessary, although I at least think we should keep the removal of the redundant dependency.

[Nutomic]

Yes removing the extra dependencies is definitely good. But I dont like to add extra derives which arent being used. Otherwise there may be dozens or hundreds of different derives we may add, and they have a cost in terms of maintenance and compile time.