Implements experience gain

PkmnLib.Dynamic/Libraries/ExperienceGainCalculator.cs

@@ -0,0 +1,14 @@
+using PkmnLib.Dynamic.Models;
+
+namespace PkmnLib.Dynamic.Libraries;
+
+/// <summary>
+/// Calculates experience gain for Pokémon battles.
+/// </summary>
+public interface IExperienceGainCalculator
+{
+    /// <summary>
+    /// Calculates the experience a Pokémon gains when defeating another Pokémon.
+    /// </summary>
+    uint CalculateExperienceGain(IPokemon defeatedPokemon, IPokemon victoriousPokemon);
+}