refactor : reorganize infra files into infra/dev and infra/prod

Consolidate Docker, Nginx, and deploy configs from 5 scattered directories
(docker/, deploy/docker/, deploy/nginx/, script/) into a single infra/ tree
with dev/ and prod/ subdirectories. Update all references in docker-compose,
Makefile, CI workflows, Dockerfiles, and documentation.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

infra/dev/xdebug.ini

@@ -0,0 +1,9 @@
+zend_extension = /usr/local/lib/php/extensions/no-debug-non-zts-20240924/xdebug.so
+xdebug.mode=debug
+xdebug.idekey=PHPSTORM
+xdebug.start_with_request=yes
+xdebug.discover_client_host=1
+xdebug.client_port=9003
+xdebug.log="/var/www/html/LOG/xdebug.log"
+xdebug.log_level=0
+xdebug.connect_timeout_ms=2