Please support Serialize for generated Diff structs

[SamusAranX]

We're using this crate at work to generate diffs between complicated structs.
Recently it became necessary to serialize differences out to file, so I added quick and dirty Serialize support by putting #[derive(Serialize)] in a small number of places. (see here)
The main problem with this approach (beyond being a dirty hack) is that the entire Diff structure is serialized rather than just the branches/leaves with changes in them.
I'm not good enough with macros to attempt to change that.

Would you please consider making Diff structs serializable in a way that leaves out unchanged parts? It'd be extremely helpful. Thanks!

[sunshowers]

Interesting idea! I'm not sure how easy it would be, though -- keep in mind that daft itself does not use Eq or similar other than in extension methods.
So we'd probably have to structure this as some kind of custom serializer that is only implemented if Eq is implemented (on just those fields?). But I'm really not sure how to express that properly.

[sunshowers]

So I asked Claude to prototype something. Here's what it came up with: #82.

I haven't reviewed it in-depth but i'm curious what your thoughts are. I wouldn't release something like this without a lot of review, of course.