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>

examples/multiplayer-fps/scripts/team-manager.gd

@@ -0,0 +1,56 @@
+extends Node
+class_name TeamManager
+
+enum Team { NONE = -1, T = 0, CT = 1 }
+
+signal team_changed(peer_id: int, team: Team)
+
+# peer_id -> Team
+var assignments: Dictionary = {}
+
+func _ready():
+	NetworkEvents.on_peer_leave.connect(_handle_peer_leave)
+
+func get_team(peer_id: int) -> Team:
+	return assignments.get(peer_id, Team.NONE) as Team
+
+func get_team_members(team: Team) -> Array[int]:
+	var members: Array[int] = []
+	for peer_id in assignments:
+		if assignments[peer_id] == team:
+			members.append(peer_id)
+	return members
+
+func get_team_name(team: Team) -> String:
+	match team:
+		Team.T: return "Terrorists"
+		Team.CT: return "Counter-Terrorists"
+		_: return "Unassigned"
+
+func auto_assign(peer_id: int) -> Team:
+	var t_count := get_team_members(Team.T).size()
+	var ct_count := get_team_members(Team.CT).size()
+	var team := Team.T if t_count <= ct_count else Team.CT
+	assign_team(peer_id, team)
+	return team
+
+func assign_team(peer_id: int, team: Team) -> void:
+	if not multiplayer.is_server():
+		return
+
+	assignments[peer_id] = team
+	_sync_assignment.rpc(peer_id, team)
+	team_changed.emit(peer_id, team)
+
+@rpc("authority", "call_local", "reliable")
+func _sync_assignment(peer_id: int, team: int) -> void:
+	assignments[peer_id] = team as Team
+	team_changed.emit(peer_id, team as Team)
+
+func sync_to_peer(peer_id: int) -> void:
+	## Send all current team assignments to a late-joining peer.
+	for pid in assignments:
+		_sync_assignment.rpc_id(peer_id, pid, assignments[pid])
+
+func _handle_peer_leave(peer_id: int) -> void:
+	assignments.erase(peer_id)