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>

addons/vest/measures/average-measure.gd

@@ -0,0 +1,20 @@
+extends VestMeasure
+
+## Measures the average of a metric.
+
+var _sum: Variant
+var _count: int = 0
+
+func _init(p_metric: StringName):
+  super(p_metric)
+
+func get_measure_name() -> String:
+  return "average"
+
+func get_value() -> Variant:
+  return _sum / _count
+
+func ingest(value: Variant) -> void:
+  _sum = _sum + value if _count else value
+  _count += 1
+

addons/vest/measures/average-measure.gd.uid

@@ -0,0 +1 @@
+uid://df6rp7biyybqa

addons/vest/measures/max-measure.gd

@@ -0,0 +1,20 @@
+extends VestMeasure
+
+## Measures the maximum of a metric.
+
+var _max: Variant
+var _has: bool = false
+
+func _init(p_metric: StringName):
+  super(p_metric)
+
+func get_measure_name() -> String:
+  return "max"
+
+func get_value() -> Variant:
+  return _max
+
+func ingest(value: Variant) -> void:
+  _max = max(_max, value) if _has else value
+  _has = true
+

addons/vest/measures/max-measure.gd.uid

@@ -0,0 +1 @@
+uid://dkd237tw7ixyw

addons/vest/measures/measure.gd

@@ -0,0 +1,38 @@
+class_name VestMeasure
+
+## Base class for implementing measures.
+##
+## During benchmarks, the benchmarked code may emit custom metrics. Measures
+## listen to these metrics, and aggregate the many emitted values into a single
+## value, that can be included in the test report.
+## [br][br]
+## For example, a measure may simply count the number of emissions, calculate
+## the average of the emitted values, or keep track of the minimum and maximum
+## value emitted.
+
+var _metric: StringName = &""
+
+func _init(p_metric: StringName):
+	_metric = p_metric
+
+## Get the name of the metric this measure tracks.
+func get_metric_name() -> StringName:
+	return _metric
+
+## Get the name of the measure.
+## [br][br]
+## [i]override[/i]
+func get_measure_name() -> String:
+	return ""
+
+## Get the value of the measure.
+## [br][br]
+## [i]override[/i]
+func get_value() -> Variant:
+	return null
+
+## Ingest an emitted metric value.
+## [br][br]
+## [i]override[/i]
+func ingest(_value: Variant) -> void:
+	pass

addons/vest/measures/measure.gd.uid

@@ -0,0 +1 @@
+uid://ds6pfq1623j80

addons/vest/measures/min-measure.gd

@@ -0,0 +1,20 @@
+extends VestMeasure
+
+## Measures the minimum of a metric.
+
+var _min: Variant
+var _has: bool = false
+
+func _init(p_metric: StringName):
+  super(p_metric)
+
+func get_measure_name() -> String:
+  return "min"
+
+func get_value() -> Variant:
+  return _min
+
+func ingest(value: Variant) -> void:
+  _min = min(_min, value) if _has else value
+  _has = true
+

addons/vest/measures/min-measure.gd.uid

@@ -0,0 +1 @@
+uid://c8kvrmiyl1hph

addons/vest/measures/sum-measure.gd

@@ -0,0 +1,20 @@
+extends VestMeasure
+
+## Measures the sum of a metric.
+
+var _sum: Variant
+var _has: bool = false
+
+func _init(p_metric: StringName):
+  super(p_metric)
+
+func get_measure_name() -> String:
+  return "sum"
+
+func get_value() -> Variant:
+  return _sum
+
+func ingest(value: Variant) -> void:
+  _sum = _sum + value if _has else value
+  _has = true
+

addons/vest/measures/sum-measure.gd.uid

@@ -0,0 +1 @@
+uid://dbmj156egy6v

addons/vest/measures/value-measure.gd

@@ -0,0 +1,18 @@
+extends VestMeasure
+
+## Measures the value of a metric, retaining only the last emitted value.
+
+var _value: Variant = null
+
+func _init(p_metric: StringName):
+  super(p_metric)
+
+func get_measure_name() -> String:
+  return "value"
+
+func get_value() -> Variant:
+  return _value
+
+func ingest(value: Variant) -> void:
+  _value = value
+

addons/vest/measures/value-measure.gd.uid

@@ -0,0 +1 @@
+uid://k53m1xtcmsvh