Begin work on outlining dynamic side

PkmnLib.Dynamic/Libraries/BattleStatCalculator.cs

@@ -0,0 +1,30 @@
+using PkmnLib.Dynamic.Models;
+using PkmnLib.Static;
+
+namespace PkmnLib.Dynamic.Libraries;
+
+/// <summary>
+/// A battle stat calculator is used to calculate stats for a Pokemon.
+/// </summary>
+public interface IBattleStatCalculator
+{
+    /// <summary>
+    /// Calculate all the flat stats of a Pokemon, disregarding stat boosts.
+    /// </summary>
+    void CalculateFlatStats(IPokemon pokemon, StatisticSet<uint> stats);
+    
+    /// <summary>
+    /// Calculate a single flat stat of a Pokemon, disregarding stat boosts.
+    /// </summary>
+    uint CalculateFlatStat(IPokemon pokemon, Statistic stat);
+    
+    /// <summary>
+    /// Calculate all the boosted stats of a Pokemon, including stat boosts.
+    /// </summary>
+    void CalculateBoostedStats(IPokemon pokemon, StatisticSet<uint> stats);
+    
+    /// <summary>
+    /// Calculate a single boosted stat of a Pokemon, including stat boosts.
+    /// </summary>
+    uint CalculateBoostedStat(IPokemon pokemon, Statistic stat);
+}