chore: remove nous-api provider (API key path)

Nous Portal only supports OAuth authentication. Remove the 'nous-api'
provider which allowed direct API key access via NOUS_API_KEY env var.

Removed from:
- hermes_cli/auth.py: PROVIDER_REGISTRY entry + aliases
- hermes_cli/config.py: OPTIONAL_ENV_VARS entry
- hermes_cli/setup.py: setup wizard option + model selection handler
  (reindexed remaining provider choices)
- agent/auxiliary_client.py: docstring references
- tests/test_runtime_provider_resolution.py: nous-api test
- tests/integration/test_web_tools.py: renamed dict key

hermes_cli/auth.py

@@ -108,14 +108,6 @@ PROVIDER_REGISTRY: Dict[str, ProviderConfig] = {
         auth_type="oauth_external",
         inference_base_url=DEFAULT_CODEX_BASE_URL,
     ),
-    "nous-api": ProviderConfig(
-        id="nous-api",
-        name="Nous Portal (API Key)",
-        auth_type="api_key",
-        inference_base_url="https://inference-api.nousresearch.com/v1",
-        api_key_env_vars=("NOUS_API_KEY",),
-        base_url_env_var="NOUS_BASE_URL",
-    ),
     "zai": ProviderConfig(
         id="zai",
         name="Z.AI / GLM",
@@ -521,7 +513,6 @@ def resolve_provider(
 
     # Normalize provider aliases
     _PROVIDER_ALIASES = {
-        "nous_api": "nous-api", "nousapi": "nous-api", "nous-portal-api": "nous-api",
         "glm": "zai", "z-ai": "zai", "z.ai": "zai", "zhipu": "zai",
         "kimi": "kimi-coding", "moonshot": "kimi-coding",
         "minimax-china": "minimax-cn", "minimax_cn": "minimax-cn",