feat: add /var/log/proxy mount and CLI parameters for non-interactive mode (#229)

* feat: add /var/log/proxy mount and CLI parameters for non-interactive mode

1. Mount /var/log/proxy from container to $DATA_FOLDER/logs on host
   - Enables access to gateway access logs for external monitoring
   - Useful for token tracking and session analysis

2. Add comprehensive CLI parameters for non-interactive configuration:
   - --non-interactive/--batch: Run in batch mode without prompts
   - Port configuration: --http-port, --https-port, --console-port
   - Container options: --container-name, --image-repo, --image-tag
   - Data folder: --data-folder
   - Auto-routing: --auto-routing, --auto-routing-default-model
   - LLM Provider API Keys for 20+ providers

Examples:
  # Non-interactive with Dashscope
  ./get-ai-gateway.sh start --non-interactive --dashscope-key sk-xxx

  # With auto-routing
  ./get-ai-gateway.sh start --non-interactive \
    --dashscope-key sk-xxx --auto-routing --auto-routing-default-model qwen-turbo

* feat: add route subcommand for managing auto-routing rules

Add 'route' command with subcommands to manage model routing rules:

Commands:
  route add     - Add a new routing rule
  route list    - List all routing rules
  route remove  - Remove a routing rule by ID

Options:
  --model       Target model for routing
  --trigger     Trigger phrase(s), e.g. '深入思考|deep thinking'
  --pattern     Custom regex pattern (alternative to trigger)
  --rule-id     Rule ID to remove

Examples:
  # Add rule for complex reasoning
  ./get-ai-gateway.sh route add --model claude-opus-4.5 --trigger '深入思考|deep thinking'

  # Add rule for coding
  ./get-ai-gateway.sh route add --model qwen-coder --trigger '写代码|code:'

  # List rules
  ./get-ai-gateway.sh route list

  # Remove rule
  ./get-ai-gateway.sh route remove --rule-id 0

Features:
- Hot-reload configuration without container restart
- Python YAML editing for reliability (with sed fallback)
- Pattern auto-generation from trigger phrases
- Container connectivity check

Author: johnlanni