build: Windows x86_64 export preset + first release build

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

.gitignore

@@ -1,6 +1,4 @@
 .godot/
 *.import
 export.cfg
-export_presets.cfg
-builds/
 .import/

export_presets.cfg

@@ -0,0 +1,43 @@
+[preset.0]
+
+name="Windows Desktop"
+platform="Windows Desktop"
+runnable=true
+advanced_options=false
+dedicated_server=false
+custom_features=""
+export_filter="all_resources"
+include_filter=""
+exclude_filter=""
+export_path="builds/DauphinCraft.exe"
+encryption_include_filters=""
+encryption_exclude_filters=""
+encrypt_pck=false
+encrypt_directory=false
+script_export_mode=2
+
+[preset.0.options]
+
+custom_template/debug=""
+custom_template/release=""
+debug/export_console_wrapper=1
+binary_format/embed_pck=false
+texture_format/s3tc_bptc=true
+texture_format/etc2_astc=false
+binary_format/architecture="x86_64"
+codesign/enable=false
+application/modify_resources=true
+application/icon=""
+application/console_wrapper_icon=""
+application/icon_interpolation=4
+application/file_version=""
+application/product_version=""
+application/company_name="DauphinCraft"
+application/product_name="DauphinCraft"
+application/file_description="Jeu voxel sous-marin"
+application/copyright=""
+application/trademarks=""
+application/export_angle=0
+application/export_d3d12=0
+application/d3d12_agility_sdk_multiarch=true
+ssh_remote_deploy/enabled=false