feat: Add winctl.sh management script and multi-version setup

Add winctl.sh with 12 commands for managing Windows Docker containers:
- start, stop, restart, status, logs, shell, stats
- build, rebuild, list, inspect, monitor, check
- Interactive menus, prerequisites checking, color output
- Support for 22 Windows versions across 4 categories

Multi-version compose structure:
- Split base.yml into base-modern.yml (8G) and base-legacy.yml (2G)
- Add .env.example for configuration
- Update all compose files to use env_file
- Add unique port mappings per version
- Update README with winctl.sh documentation

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

compose/base-legacy.yml

@@ -0,0 +1,23 @@
+x-legacy: &legacy
+  image: dockurr/windows
+  devices:
+    - /dev/kvm
+    - /dev/net/tun
+  cap_add:
+    - NET_ADMIN
+  restart: unless-stopped
+  stop_grace_period: 2m
+  environment:
+    RAM_SIZE: ${LEGACY_RAM_SIZE:-2G}
+    CPU_CORES: ${LEGACY_CPU_CORES:-2}
+    DISK_SIZE: ${LEGACY_DISK_SIZE:-32G}
+    USERNAME: ${USERNAME:-Docker}
+    PASSWORD: ${PASSWORD:-admin}
+    LANGUAGE: ${LANGUAGE:-en}
+    REGION: ${REGION:-en-US}
+    KEYBOARD: ${KEYBOARD:-en-US}
+    WIDTH: ${WIDTH:-1280}
+    HEIGHT: ${HEIGHT:-720}
+    DHCP: ${DHCP:-N}
+    SAMBA: ${SAMBA:-Y}
+    DEBUG: ${DEBUG:-N}