Add all missing docs

PkmnLib.Dynamic/Events/LevelUpEvent.cs

@@ -2,8 +2,12 @@ using PkmnLib.Dynamic.Models;
 
 namespace PkmnLib.Dynamic.Events;
 
+/// <summary>
+/// Represents an event that occurs when a Pokémon gains enough experience points to level up.
+/// </summary>
 public class LevelUpEvent : IEventData
 {
+    /// <inheritdoc cref="LevelUpEvent"/>
     public LevelUpEvent(IPokemon pokemon, int previousLevel, int newLevel)
     {
         Pokemon = pokemon;
@@ -11,10 +15,19 @@ public class LevelUpEvent : IEventData
         NewLevel = newLevel;
     }
 
+    /// <summary>
+    /// The new level of the Pokémon after leveling up.
+    /// </summary>
     public int NewLevel { get; set; }
 
+    /// <summary>
+    /// The previous level of the Pokémon before leveling up.
+    /// </summary>
     public int PreviousLevel { get; set; }
 
+    /// <summary>
+    /// The Pokémon that leveled up.
+    /// </summary>
     public IPokemon Pokemon { get; set; }
 
     /// <inheritdoc />