Attempt to make str -> ron::Value lossless

[wiiznokes]

This PR have the same goal of #328 (i just saw it while opening this one)

This PR currently do not even compile. I'm only opening it for visibility/feedback. I think my map module have some potential though.

I came across a potential blocker (serde-rs/serde#2218). The name of a struct need to have a static lifetime somehow. I think i will try to workaround it by leaking memory for now.

I still need to figuring out the de serialization part

[juntyr]

What if type (and field) names are stored using a Cow<‘static, str>? On deserialize, we just fill in a String. On serialise, we fail if the Cow is borrowed. Value then gets a convenience method to leak all owned strings (in the future we could also add a method that uses an interner so that no duplicate leaks occur).

[wiiznokes]

What if type (and field) names are stored using a Cow<‘static, str>? On deserialize, we just fill in a String. On serialise, we fail if the Cow is borrowed. Value then gets a convenience method to leak all owned strings (in the future we could also add a method that uses an interner so that no duplicate leaks occur).

That seems like a nice work around