Release v0.1.1

Restructure modules into backend-specific namespaces with shared beha…

…viours

- Split monolithic Config into backend configs (Codex.Config, Claude.Config,
  Linear.Config, GitHub.Config, Memory.Config) behind AgentConfig/TrackerConfig
  behaviours
- Move event normalization (normalize_event/1) into each coding agent module,
  removing ~250 lines of format-sniffing from orchestrator
- Move event humanization into Codex.EventHumanizer and Claude.EventHumanizer
  behind EventHumanizer behaviour
- Rename app_server → coding_agent, adapter → tracker, Linear.Issue → Issue,
  codex_totals → agent_totals, app_server_command → command
- Revert live_running_seconds double-counting in orchestrator snapshot
- Update README for multi-backend (Linear/GitHub tracker, Codex/Claude agent)

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