Add complete OAuth token refresh and sync solution

- Setup wizard with auto-detection of OpenClaw paths and Claude CLI
- Token sync watcher (inotifywait) for real-time credential updates
- Auto-refresh trigger timer that runs Claude CLI every 30 min
- Supports Claude CLI in Docker container or on host
- Temporary ANTHROPIC_BASE_URL override for container environments
- Anthropic model configuration for OpenClaw
- Auth profile management (fixes key vs access field)
- Systemd services and timers for both sync and trigger
- Comprehensive documentation and troubleshooting guides
- Re-authentication notification system

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

templates/oauth.json.template

@@ -0,0 +1,10 @@
+{
+  "anthropic": {
+    "access": "sk-ant-oat01-YOUR_ACCESS_TOKEN_HERE",
+    "refresh": "sk-ant-ort01-YOUR_REFRESH_TOKEN_HERE",
+    "expires": 1772120060006,
+    "scopes": ["user:inference", "user:mcp_servers", "user:profile", "user:sessions:claude_code"],
+    "subscriptionType": "max",
+    "rateLimitTier": "default_claude_max_5x"
+  }
+}