build: Linux dedicated server preset + deploy package (systemd + install script)

- export_presets.cfg: ajout preset.1 Linux Server (dedicated_server=true, embed_pck=true, x86_64)
- builds/DauphinCraftServer.x86_64: binaire serveur Linux 76MB
- builds/run_server.sh: launcher avec port configurable
- deploy/: dauphincraft.service (systemd) + install.sh (VM setup)
- deploy_package/: tarball + scripts prêts à transférer sur VM
- Rebuild client Windows inclus (DauphinCraft.exe 100MB, exit 0)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

export_presets.cfg

@@ -41,3 +41,32 @@ application/export_angle=0
 application/export_d3d12=0
 application/d3d12_agility_sdk_multiarch=true
 ssh_remote_deploy/enabled=false
+
+[preset.1]
+
+name="Linux Server"
+platform="Linux"
+runnable=true
+advanced_options=false
+dedicated_server=true
+custom_features=""
+export_filter="all_resources"
+include_filter=""
+exclude_filter=""
+export_path="builds/DauphinCraftServer.x86_64"
+encryption_include_filters=""
+encryption_exclude_filters=""
+encrypt_pck=false
+encrypt_directory=false
+script_export_mode=2
+
+[preset.1.options]
+
+custom_template/debug=""
+custom_template/release=""
+debug/export_console_wrapper=1
+binary_format/embed_pck=true
+texture_format/s3tc_bptc=true
+texture_format/etc2_astc=false
+binary_format/architecture="x86_64"
+ssh_remote_deploy/enabled=false