Begin work on outlining dynamic side

PkmnLib.Dynamic/Libraries/DamageCalculator.cs

@@ -0,0 +1,24 @@
+using PkmnLib.Dynamic.Models;
+
+namespace PkmnLib.Dynamic.Libraries;
+
+/// <summary>
+/// A damage library holds the functions related to the calculation of damage.
+/// </summary>
+public interface IDamageCalculator
+{
+    /// <summary>
+    /// Calculate the damage for a given hit on a Pokemon.
+    /// </summary>
+    uint GetDamage(IExecutingMove executingMove, IPokemon target, byte hitNumber, HitData hitData);
+
+    /// <summary>
+    /// Calculate the base power for a given hit on a Pokemon.
+    /// </summary>
+    byte GetBasePower(IExecutingMove executingMove, IPokemon target, byte hitNumber, HitData hitData);
+
+    /// <summary>
+    /// Returns whether a specified hit should be critical or not.
+    /// </summary>
+    bool IsCritical(IBattle battle, IExecutingMove executingMove, IPokemon target, byte hitNumber);
+}