feat: integrate ChaffGames FPS template as local player controller

Replaces the overhead box-mesh view with a full FPS character:

- mouse look, WASD movement, jump (Space), crouch (C), sprint (Shift), lean (Q/E)

- 6 weapons (LMB shoot, R reload, scroll switch, F melee, G drop)

- Crosshair HUD, ammo counter, sprint bar

- Client sends position to server at 20Hz for multiplayer visibility

- Server broadcasts positions to all peers

- Remote players shown as boxes (placeholder)

source: https://godotengine.org/asset-library/asset/2652 (MIT license)

client/template/scripts/Weapon_State_Machine/PickUp Weapons/Weapon_Pick_Up.gd

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+extends RigidBody3D
+class_name WeaponPickUp
+
+@export var weapon: WeaponSlot
+@export_enum("Weapon","Ammo") var TYPE = "Weapon"
+
+var Pick_Up_Ready: bool = false
+
+func _ready():
+	await get_tree().create_timer(2.0).timeout
+	Pick_Up_Ready = true

client/template/scripts/Weapon_State_Machine/PickUp Weapons/Weapon_Pick_Up.gd.uid

@@ -0,0 +1 @@
+uid://deaf6cmuofa0

client/template/scripts/Weapon_State_Machine/PickUp Weapons/reload_clip.gd

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+extends RigidBody3D
+
+@export var _weapon_name: String
+@export var _current_ammo: int
+@export var _reserve_ammo: int
+
+const TYPE = "Ammo"
+
+var Pick_Up_Ready: bool = false
+
+func _ready():
+	await get_tree().create_timer(2.0).timeout
+	Pick_Up_Ready = true
+
+func Set_Ammo(w_name: String, c_ammo : int, r_ammo : int):
+	if w_name == _weapon_name:
+		_current_ammo = c_ammo
+		_reserve_ammo = r_ammo

client/template/scripts/Weapon_State_Machine/PickUp Weapons/reload_clip.gd.uid

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+uid://dvxmf6dpx0qdn