Add notes for dev boss AI

Content/NPCs/OriginalNeptune/Raccoon.cs

@@ -31,7 +31,17 @@ namespace ForgottenWawiTech.Content.NPCs.OriginalNeptune
 
         public override void AI()
         {
-            // Placeholder AI: dash toward player occasionally
+            /*
+            IDEA:
+            Mr Raccoon will fight on the ground, throwing himself and projectiles at the player.
+            He will have a dash attack where he quickly rushes the player, dealing high damage on contact.
+            He will also have a projectile attack where he throws pieces of trash at the player from a distance.
+            He is meant to serve as a distraction and secondary threat while Neptune fights from above - meaning to overwhelm the player with multiple threats.
+            0 - 50% HP: Normal behavior (Phase 1)
+            50% - 25% HP: Increases dash attack speed and frequency (Phase 2)
+            25% - 0% HP: Increases all attack speeds and movement speeds (Phase 3)
+            If Neptune is defeated while Mr Raccoon is still alive, Mr Raccoon will flee the battle (run towards the ocean) - if he is defeated during this state, he will drop a vanity developer set.
+            */
             Player target = Main.player[NPC.target];
             if (!target.active || target.dead)
             {