v1.8.0

New Components

• agent-mode: Add agent mode for AI coding agents (#68)
  When active, agent mode defaults output to JSON, returns errors as JSON on
  stderr, emits --help as structured JSON, skips confirmation prompts, and
  disables colored output. Agent mode is activated via --agent-mode, the
  DASH0_AGENT_MODE environment variable, or auto-detection of known AI agent
  environment variables (CLAUDE_CODE, MCP_SESSION_ID, CURSOR_SESSION_ID, etc.).