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/blasterL.tres

@@ -0,0 +1,29 @@
+[gd_resource type="Resource" script_class="WeaponResource" load_steps=5 format=3 uid="uid://bwrs8ensewkgc"]
+
+[ext_resource type="PackedScene" uid="uid://bpxa3je174q43" path="res://client/template/Spawnable_Objects/Projectiles_To_Load/basic_rigid_body_projectile.tscn" id="1_1tllq"]
+[ext_resource type="Script" uid="uid://ca7h24lxxrtvx" path="res://client/template/scripts/Weapon_State_Machine/weapon_resource.gd" id="2_gpxoe"]
+[ext_resource type="PackedScene" uid="uid://gtthejj2wmyj" path="res://client/template/Spawnable_Objects/Weapons/blaster_n.tscn" id="3_5a5l8"]
+[ext_resource type="PackedScene" uid="uid://3mb12hvruajh" path="res://client/template/Spawnable_Objects/SprayProfiles/spray_profile_2.tscn" id="4_p50xh"]
+
+[resource]
+script = ExtResource("2_gpxoe")
+weapon_name = "blasterN"
+pick_up_animation = "Global/blasterL Activate"
+shoot_animation = "Global/blasterL Shoot"
+reload_animation = "Global/blasterL Reload"
+change_animation = "Global/blasterL De-Activate"
+drop_animation = "Global/blasterL Drop"
+out_of_ammo_animation = "Global/blasterL OOA"
+melee_animation = "Global/blasterL Melee"
+has_ammo = true
+magazine = 30
+max_ammo = 60
+damage = 1
+melee_damage = 1.0
+auto_fire = true
+fire_range = 100
+can_be_dropped = true
+weapon_drop = ExtResource("3_5a5l8")
+weapon_spray = ExtResource("4_p50xh")
+projectile_to_load = ExtResource("1_1tllq")
+incremental_reload = false