docs: add Alibaba Cloud and DingTalk to setup wizard and docs (#1687)

* feat(gateway): add DingTalk platform adapter

Add DingTalk as a messaging platform using the dingtalk-stream SDK
for real-time message reception via Stream Mode (no webhook needed).
Replies are sent via session webhook using markdown format.

Features:
- Stream Mode connection (long-lived WebSocket, no public URL needed)
- Text and rich text message support
- DM and group chat support
- Message deduplication with 5-minute window
- Auto-reconnection with exponential backoff
- Session webhook caching for reply routing

Configuration:
  export DINGTALK_CLIENT_ID=your-app-key
  export DINGTALK_CLIENT_SECRET=your-app-secret

  # or in config.yaml:
  platforms:
    dingtalk:
      enabled: true
      extra:
        client_id: your-app-key
        client_secret: your-app-secret

Files:
- gateway/platforms/dingtalk.py (340 lines) — adapter implementation
- gateway/config.py — add DINGTALK to Platform enum
- gateway/run.py — add DingTalk to _create_adapter
- hermes_cli/config.py — add env vars to _EXTRA_ENV_KEYS
- hermes_cli/tools_config.py — add dingtalk to PLATFORMS
- tests/gateway/test_dingtalk.py — 21 tests

* docs: add Alibaba Cloud and DingTalk to setup wizard and docs

Wire Alibaba Cloud (DashScope) into hermes setup and hermes model
provider selection flows. Add DingTalk env vars to documentation.

Changes:
- setup.py: Add Alibaba Cloud as provider choice (index 11) with
  DASHSCOPE_API_KEY prompt and model studio link
- main.py: Add alibaba to provider_labels, providers list, and
  model flow dispatch
- environment-variables.md: Add DASHSCOPE_API_KEY, DINGTALK_CLIENT_ID,
  DINGTALK_CLIENT_SECRET, and alibaba to HERMES_INFERENCE_PROVIDER

hermes_cli/main.py

@@ -784,6 +784,7 @@ def cmd_model(args):
         "opencode-go": "OpenCode Go",
         "ai-gateway": "AI Gateway",
         "kilocode": "Kilo Code",
+        "alibaba": "Alibaba Cloud (DashScope)",
         "custom": "Custom endpoint",
     }
     active_label = provider_labels.get(active, active)
@@ -807,6 +808,7 @@ def cmd_model(args):
         ("opencode-zen", "OpenCode Zen (35+ curated models, pay-as-you-go)"),
         ("opencode-go", "OpenCode Go (open models, $10/month subscription)"),
         ("ai-gateway", "AI Gateway (Vercel — 200+ models, pay-per-use)"),
+        ("alibaba", "Alibaba Cloud / DashScope (Qwen models, Anthropic-compatible)"),
     ]
 
     # Add user-defined custom providers from config.yaml
@@ -875,7 +877,7 @@ def cmd_model(args):
         _model_flow_anthropic(config, current_model)
     elif selected_provider == "kimi-coding":
         _model_flow_kimi(config, current_model)
-    elif selected_provider in ("zai", "minimax", "minimax-cn", "kilocode", "opencode-zen", "opencode-go", "ai-gateway"):
+    elif selected_provider in ("zai", "minimax", "minimax-cn", "kilocode", "opencode-zen", "opencode-go", "ai-gateway", "alibaba"):
         _model_flow_api_key_provider(config, selected_provider, current_model)