Implements first few actual move effects.

pkmn_lib_interface/src/app_interface/static_data/mod.rs

@@ -14,3 +14,23 @@ pub use nature::*;
 pub use species::*;
 
 pub type LevelInt = u8;
+
+/// A unique key that can be used to store a reference to a type. Opaque reference to a byte
+/// internally.
+#[derive(Debug, Copy, Clone, Eq, PartialEq, Default, Hash)]
+pub struct TypeIdentifier {
+    /// The unique internal value.
+    val: u8,
+}
+
+impl From<u8> for TypeIdentifier {
+    fn from(val: u8) -> Self {
+        Self { val }
+    }
+}
+
+impl From<TypeIdentifier> for u8 {
+    fn from(id: TypeIdentifier) -> Self {
+        id.val
+    }
+}