feat(picker): fold Qwen providers into one group row in provider pickers (#67758)

Consolidates the three Qwen provider slugs (alibaba / Qwen Cloud,
alibaba-coding-plan / Alibaba Cloud Coding Plan, qwen-oauth / Qwen CLI
OAuth) under a single 'Qwen' group row in the interactive provider
pickers, matching the existing OpenAI / Kimi / MiniMax / xAI groups.

Display-only via PROVIDER_GROUPS — slug identity, --provider, and
/model <provider:model> paths are unchanged. Because group_providers()
is the shared fold, the CLI 'hermes model' picker, the setup wizard,
and the Telegram /model keyboard all pick up the grouping with no
per-surface changes.

hermes_cli/models.py

@@ -1141,6 +1141,7 @@ PROVIDER_GROUPS: dict[str, tuple[str, str, list[str]]] = {
     "xai":      ("xAI Grok",        "Direct API or SuperGrok / Premium+ OAuth",        ["xai", "xai-oauth"]),
     "google":   ("Google Gemini",   "Google AI Studio (API key)",                     ["gemini"]),
     "openai":   ("OpenAI",          "Codex CLI or direct OpenAI API",                  ["openai-codex", "openai-api"]),
+    "qwen":     ("Qwen",            "Qwen Cloud / DashScope, Coding Plan & Qwen CLI OAuth", ["alibaba", "alibaba-coding-plan", "qwen-oauth"]),
     "opencode": ("OpenCode",        "Zen pay-as-you-go or Go subscription",            ["opencode-zen", "opencode-go"]),
     "copilot":  ("GitHub Copilot",  "GitHub token API or copilot --acp process",       ["copilot", "copilot-acp"]),
 }