More documentation for script hooks, reworks stat changes to only be changeable through a function that allows for script hooks, and events.

src/dynamic_data/event_hooks.rs

@@ -3,8 +3,8 @@ use std::fmt::{Debug, Formatter};
 use crate::dynamic_data::DamageSource;
 use crate::dynamic_data::ExecutingMove;
 use crate::dynamic_data::Pokemon;
-use crate::static_data::Form;
 use crate::static_data::Species;
+use crate::static_data::{Form, Statistic};
 
 /// The event hook is used to store external functions that listen to events.
 ///
@@ -108,4 +108,15 @@ pub enum Event<'own, 'battle, 'library> {
     },
     /// The turn is finished running, waiting for new input.
     EndTurn,
+    /// A pokemon had its stat boost changed
+    StatBoostChange {
+        /// The pokemon that had its stat boosts changed.
+        user: &'own Pokemon<'battle, 'library>,
+        /// The statistic that changed.
+        stat: Statistic,
+        /// The value of the stat before the change.
+        old_value: i8,
+        /// The value of the stat after the change.
+        new_value: i8,
+    },
 }