feat: add z.ai/GLM, Kimi/Moonshot, MiniMax as first-class providers

Adds 4 new direct API-key providers (zai, kimi-coding, minimax, minimax-cn)
to the inference provider system. All use standard OpenAI-compatible
chat/completions endpoints with Bearer token auth.

Core changes:
- auth.py: Extended ProviderConfig with api_key_env_vars and base_url_env_var
  fields. Added providers to PROVIDER_REGISTRY. Added provider aliases
  (glm, z-ai, zhipu, kimi, moonshot). Added auto-detection of API-key
  providers in resolve_provider(). Added resolve_api_key_provider_credentials()
  and get_api_key_provider_status() helpers.
- runtime_provider.py: Added generic API-key provider branch in
  resolve_runtime_provider() — any provider with auth_type='api_key'
  is automatically handled.
- main.py: Added providers to hermes model menu with generic
  _model_flow_api_key_provider() flow. Updated _has_any_provider_configured()
  to check all provider env vars. Updated argparse --provider choices.
- setup.py: Added providers to setup wizard with API key prompts and
  curated model lists.
- config.py: Added env vars (GLM_API_KEY, KIMI_API_KEY, MINIMAX_API_KEY,
  etc.) to OPTIONAL_ENV_VARS.
- status.py: Added API key display and provider status section.
- doctor.py: Added connectivity checks for each provider endpoint.
- cli.py: Updated provider docstrings.

Docs: Updated README.md, .env.example, cli-config.yaml.example,
cli-commands.md, environment-variables.md, configuration.md.

Tests: 50 new tests covering registry, aliases, resolution, auto-detection,
credential resolution, and runtime provider dispatch.

Inspired by PR #33 (numman-ali) which proposed a provider registry approach.
Credit to tars90percent (PR #473) and manuelschipper (PR #420) for related
provider improvements merged earlier in this changeset.

hermes_cli/status.py

@@ -79,6 +79,10 @@ def show_status(args):
         "OpenRouter": "OPENROUTER_API_KEY",
         "Anthropic": "ANTHROPIC_API_KEY", 
         "OpenAI": "OPENAI_API_KEY",
+        "Z.AI/GLM": "GLM_API_KEY",
+        "Kimi": "KIMI_API_KEY",
+        "MiniMax": "MINIMAX_API_KEY",
+        "MiniMax-CN": "MINIMAX_CN_API_KEY",
         "Firecrawl": "FIRECRAWL_API_KEY",
         "Browserbase": "BROWSERBASE_API_KEY",
         "FAL": "FAL_KEY",
@@ -137,6 +141,28 @@ def show_status(args):
     if codex_status.get("error") and not codex_logged_in:
         print(f"    Error:      {codex_status.get('error')}")
 
+    # =========================================================================
+    # API-Key Providers
+    # =========================================================================
+    print()
+    print(color("◆ API-Key Providers", Colors.CYAN, Colors.BOLD))
+
+    apikey_providers = {
+        "Z.AI / GLM":       ("GLM_API_KEY", "ZAI_API_KEY", "Z_AI_API_KEY"),
+        "Kimi / Moonshot":  ("KIMI_API_KEY",),
+        "MiniMax":          ("MINIMAX_API_KEY",),
+        "MiniMax (China)":  ("MINIMAX_CN_API_KEY",),
+    }
+    for pname, env_vars in apikey_providers.items():
+        key_val = ""
+        for ev in env_vars:
+            key_val = get_env_value(ev) or ""
+            if key_val:
+                break
+        configured = bool(key_val)
+        label = "configured" if configured else "not configured (run: hermes model)"
+        print(f"  {pname:<16} {check_mark(configured)} {label}")
+
     # =========================================================================
     # Terminal Configuration
     # =========================================================================