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/Weapon_Resources/blasterN.tres

@@ -0,0 +1,26 @@
+[gd_resource type="Resource" script_class="WeaponResource" format=3 uid="uid://c1jg0ifn7yvve"]
+
+[ext_resource type="Script" uid="uid://ca7h24lxxrtvx" path="res://client/template/scripts/Weapon_State_Machine/weapon_resource.gd" id="1_oxrhl"]
+[ext_resource type="PackedScene" uid="uid://dc48o4niy1mok" path="res://client/template/Spawnable_Objects/Projectiles_To_Load/basic_hitscan_projectile.tscn" id="1_xr7bm"]
+[ext_resource type="PackedScene" uid="uid://gtthejj2wmyj" path="res://client/template/Spawnable_Objects/Weapons/blaster_n.tscn" id="3_c38hr"]
+[ext_resource type="PackedScene" uid="uid://3mb12hvruajh" path="res://client/template/Spawnable_Objects/SprayProfiles/spray_profile_2.tscn" id="4_rk8dx"]
+
+[resource]
+script = ExtResource("1_oxrhl")
+weapon_name = "blaster_n"
+pick_up_animation = "Global/blasterN Active"
+shoot_animation = "Global/blasterN Shoot"
+reload_animation = "Global/blasterN Reload"
+change_animation = "Global/blasterN De-Activate"
+drop_animation = "Global/blasterN Drop"
+out_of_ammo_animation = "Global/blasterN OOA"
+melee_animation = "Global/blasterN Melee"
+magazine = 5
+max_ammo = 15
+damage = 1
+melee_damage = 1.0
+fire_range = 100
+can_be_dropped = true
+weapon_drop = ExtResource("3_c38hr")
+weapon_spray = ExtResource("4_rk8dx")
+projectile_to_load = ExtResource("1_xr7bm")