Half of ScryfallDeser fields added

Very non-atomic - and I'm not even sure if it's half.

I think I might stop here and actually try the derserialisation stuff

scryfall_deser/Cargo.toml

@@ -0,0 +1,9 @@
+[package]
+name = "scryfall_deser"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+serde = { version = "1.0", features = ["derive"] }