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>

export_presets.cfg

@@ -1,4 +1,5 @@
 [preset.0]
+
 name="Windows Desktop"
 platform="Windows Desktop"
 runnable=true
@@ -6,18 +7,26 @@ dedicated_server=false
 custom_features=""
 export_filter="all_resources"
 include_filter=""
-exclude_filter=""
+exclude_filter="examples/forest-brawl/**, examples/input-gathering/**, examples/input-prediction/**, examples/multiplayer-netfox/**, examples/multiplayer-simple/**, examples/multiplayer-state-machine/**, examples/property-configuration/**, examples/rollback-debugger/**, examples/rollback-fps/**, examples/rollback-npc/**, examples/shared/**, examples/single-player/**, examples/snippets/**, examples/state-synchronizer-npc/**, examples/visibility-filtering/**, addons/vest/**, docs/**, test/**, sh/**, script_templates/**, *.off, .claude/**, CLAUDE.md"
 export_path="build/tactical-shooter-windows-x86_64/tactical-shooter.exe"
 patches=PackedStringArray()
+patch_delta_encoding=false
+patch_delta_compression_level_zstd=19
+patch_delta_min_reduction=0.1
+patch_delta_include_filters="*"
+patch_delta_exclude_filters=""
 encryption_include_filters=""
 encryption_exclude_filters=""
-encrypt_pck=false
+seed=0
+encrypt_pck=true
 encrypt_directory=false
-script_encryption_key=""
+script_export_mode=2
 
 [preset.0.options]
+
 custom_template/debug=""
 custom_template/release=""
+debug/export_console_wrapper=0
 binary_format/embed_pck=true
 binary_format/architecture="x86_64"
 texture_format/s3tc_bptc=true
@@ -41,6 +50,7 @@ xr_features/hand_tracking=false
 xr_features/passthrough=false
 
 [preset.1]
+
 name="Linux Server"
 platform="Linux/X11"
 runnable=true
@@ -48,16 +58,23 @@ dedicated_server=true
 custom_features=""
 export_filter="all_resources"
 include_filter=""
-exclude_filter="client/**, gdextension.disabled/**, server/server-browser-api/venv/**, **/venv/**"
+exclude_filter="examples/forest-brawl/**, examples/input-gathering/**, examples/input-prediction/**, examples/multiplayer-netfox/**, examples/multiplayer-simple/**, examples/multiplayer-state-machine/**, examples/property-configuration/**, examples/rollback-debugger/**, examples/rollback-fps/**, examples/rollback-npc/**, examples/shared/**, examples/single-player/**, examples/snippets/**, examples/state-synchronizer-npc/**, examples/visibility-filtering/**, addons/vest/**, docs/**, test/**, sh/**, script_templates/**, *.off, .claude/**, CLAUDE.md, config/**"
 export_path="build/tactical-shooter-server.x86_64"
 patches=PackedStringArray()
+patch_delta_encoding=false
+patch_delta_compression_level_zstd=19
+patch_delta_min_reduction=0.1
+patch_delta_include_filters="*"
+patch_delta_exclude_filters=""
 encryption_include_filters=""
 encryption_exclude_filters=""
-encrypt_pck=false
+seed=0
+encrypt_pck=true
 encrypt_directory=false
-script_encryption_key=""
+script_export_mode=2
 
 [preset.1.options]
+
 custom_template/debug=""
 custom_template/release=""
 binary_format/embed_pck=true
@@ -65,8 +82,6 @@ binary_format/architecture="x86_64"
 texture_format/s3tc_bptc=true
 texture_format/etc2_astc=false
 texture_format/no_bptc_fallbacks=true
-dotnet/include_scripts_content=false
-dotnet/rollforward_to_latest_prerelease=true
 codesign/identity=""
 codesign/timestamp=true
 codesign/timestamp_server_url=""