Implements modifier and stats system

Adds a modifier and stats system to manage combat-related attributes.

Introduces StatsComponent for storing entity statistics and ModifierManager for applying dynamic modifiers. Recalculates stats based on modifier type and priority.

Updates projectile and weapon components to utilize the new stats system.

combat/weapons/_scripts/melee_weapon_component.gd

@@ -1,18 +1,6 @@
 @icon("res://assets/editor/64x64/fc728.png")
-extends WeaponComponent
+extends Node2D
 class_name MeleeWeaponComponent
 
-var stats = {
-	"piercing": 3,
-}
-var combined_stats = {}
-
 func _init() -> void:
 	Log.pr("MeleeWeaponComponent initialized")
-	super._init()
-
-	# Combine the base stats with the stats from the parent class
-	combined_stats = base_stats.duplicate()
-	combined_stats.merge(stats)
-
-	Log.pr("Combined stats: ", combined_stats)