chore: add openai/gpt-5.4-pro and stepfun/step-3.5-flash to OpenRouter models

Author: teknium1

hermes_cli/models.py

@@ -13,8 +13,10 @@
     ("openai/gpt-5.2",                  ""),
     ("openai/gpt-5.3-codex",            ""),
     ("openai/gpt-5.4",                  ""),
+    ("openai/gpt-5.4-pro",              ""),
     ("google/gemini-3-pro-preview",     ""),
     ("google/gemini-3-flash-preview",   ""),
+    ("stepfun/step-3.5-flash",          ""),
     ("z-ai/glm-4.7",                    ""),
     ("moonshotai/kimi-k2.5",            ""),
     ("minimax/minimax-m2.1",            ""),