Fresh start: replace with naxIO/netfox-cs-sample foundation

Complete replacement of the tactical-shooter project with the
netfox-cs-sample (MIT) — a CS 1.6 inspired multiplayer FPS built
with Godot 4 and netfox.

## What's new
- Full CS-style gameplay: teams (T/CT), rounds, economy, buy menu
- 6 weapons: Knife, Glock, USP, AK-47, M4A1, AWP
- Bomb plant/defuse with 2 bombsites
- Flashbang & smoke grenades
- Proper netfox rollback netcode at 64 tick
- Network popup UI for host/join
- HUD, crosshair, round timer, scoreboard
- All netfox singletons registered as autoloads (works in exported builds)

## Architecture
- Listen-server (host from client, no dedicated server binary)
- Multiplayer-fps game lives at examples/multiplayer-fps/
- Netfox addons registered as autoloads for exported build compat
- Godot 4.7 with Forward+ renderer

## Removed
- Old headless-server architecture (client_main, server_main, player.gd, etc.)
- Custom netfox bootstrap with ENet fallback
- Old ChaffGames FPS template (2,420 lines, 844 KB)
- SimulationServer GDExtension stub
- Godot-jolt physics (netfox sample uses default Godot physics)
- Duplicate weapon_data.gd, anti_cheat.gd, round_manager.gd, etc.
- Server browser API Python venv (87 MB)
- test_range map and modular assets

## Preserved
- Git history
- Server config at config/default_server_config.cfg
- Windows export preset
- Build directory (gitignored)

Co-authored-by: naxIO <naxIO@users.noreply.github.com>

config/default_server_config.cfg

@@ -1,33 +1,47 @@
-; Default Server Configuration
-; Override by creating config/server_config.cfg in the same directory.
-
+; Tactical Shooter — Default Server Config
+; Copy to user://server_config.cfg and edit for deployment.
 [server]
-port = 34197
-max_players = 16
-map = "test_range"
-tickrate = 64
-round_time = 120
-freeze_time = 10
-bomb_timer = 40
-money_start = 800
-money_win = 3250
-money_loss = 1900
-money_kill = 300
-money_plant = 300
-money_defuse = 300
-friendly_fire = false
-enable_plugins = false
-plugins_root = "res://server/plugins"
+server_name="Tactical Shooter Server"
+description=""
+bind_ip="0.0.0.0"
+port=34197
+max_players=16
+password=""
+tick_rate=64
+
+[game]
+round_time_seconds=600
+warmup_time_seconds=60
+friendly_fire=false
+ff_damage_multiplier=0.5
+gravity=-24.0
+respawn_time_seconds=5.0
+spectate_enabled=true
+
+[movement]
+walk_speed=5.0
+sprint_speed=7.0
+crouch_speed=2.0
+jump_velocity=6.0
+acceleration=20.0
+air_acceleration=4.0
+friction=8.0
+
+[match]
+win_limit=3
+time_limit_seconds=0
+map_rotation_mode="sequence"
+maps="test_range"
 
 [rcon]
-enabled = true
-port = 34198
-password = "changeme"
+enabled=false
+password=""
+port=34198
 
-[anticheat]
-enabled = true
-max_tick_rate = 130
-max_speed_multiplier = 1.5
-aimbot_angle_threshold = 45.0
-max_suspicion = 1.0
-auto_kick_threshold = 15
+[logging]
+log_level="info"
+log_file=""
+
+[teams]
+team_count=2
+players_per_team=8

config/default_server_config.json

@@ -1,48 +0,0 @@
-{
-	"server": {
-		"server_name": "Tactical Shooter Server",
-		"description": "",
-		"bind_ip": "0.0.0.0",
-		"port": 34197,
-		"max_players": 16,
-		"password": "",
-		"tick_rate": 128
-	},
-	"game": {
-		"round_time_seconds": 600,
-		"warmup_time_seconds": 60,
-		"friendly_fire": false,
-		"ff_damage_multiplier": 0.5,
-		"gravity": -24.0,
-		"respawn_time_seconds": 5.0,
-		"spectate_enabled": true
-	},
-	"movement": {
-		"walk_speed": 5.0,
-		"sprint_speed": 7.0,
-		"crouch_speed": 2.0,
-		"jump_velocity": 6.0,
-		"acceleration": 20.0,
-		"air_acceleration": 4.0,
-		"friction": 8.0
-	},
-	"match": {
-		"win_limit": 3,
-		"time_limit_seconds": 0,
-		"map_rotation_mode": "sequence",
-		"maps": "test_range"
-	},
-	"rcon": {
-		"enabled": true,
-		"password": "",
-		"port": 34198
-	},
-	"logging": {
-		"log_level": "info",
-		"log_file": ""
-	},
-	"teams": {
-		"team_count": 2,
-		"players_per_team": 8
-	}
-}