feat: add BasePower abstraction

Powers/OneShot.cs

@@ -0,0 +1,66 @@
+using CounterStrikeSharp.API;
+using CounterStrikeSharp.API.Core;
+using CounterStrikeSharp.API.Modules.Utils;
+using Cs2SuperPowers.Players;
+using Cs2SuperPowers.Players.PlayerValidations;
+
+namespace Cs2SuperPowers.Powers;
+
+public class OneShot(IPlayerHud playerHud) : BasePower(playerHud)
+{
+    private const double InstantKillChance = 0.25;
+    private readonly Random _random = new();
+
+    public override int Id => 23;
+    public override string Name => "One Shot";
+    
+    public override string Description => $"Each damaging hit has a {(int)(InstantKillChance * 100)}% chance to instantly eliminate the enemy.";
+    
+    public override char ChatColor => ChatColors.Magenta;
+
+    public override string HtmlColor => "#ff5CD9";
+
+    protected override void OnInitialize()
+    {
+        RegisterEventHandler<EventPlayerHurt>(OnPlayerHurt);
+    }
+
+    private HookResult OnPlayerHurt(EventPlayerHurt @event, GameEventInfo info)
+    {
+        var attacker = @event.Attacker;
+        var victim = @event.Userid;
+        
+        if (!Ensure.Player(attacker).IsValid().IsAlive().Check() ||
+            !Ensure.Player(victim).IsValid().Check() ||
+            attacker == victim ||
+            !IsAssignedTo(attacker!))
+        {
+            return HookResult.Continue;
+        }
+
+        // Check for at least 1 player in the opposing team
+        var attackerTeam = attacker!.Team;
+        var enemyCount = Utilities.GetPlayers().Count(p => 
+            p.IsValid && p.Team != CsTeam.None && p.Team != CsTeam.Spectator && p.Team != attackerTeam);
+        if (enemyCount < 1)
+        {
+            return HookResult.Continue;
+        }
+
+        var victimPawn = victim!.PlayerPawn.Value;
+        if (victimPawn == null)
+        {
+            return HookResult.Continue;
+        }
+
+        if (_random.NextDouble() > InstantKillChance)
+        {
+            return HookResult.Continue;
+        }
+
+        victimPawn.Health = 0;
+        Utilities.SetStateChanged(victimPawn, "CBaseEntity", "m_iHealth");
+        
+        return HookResult.Continue;
+    }
+}