feat: add kimi-k2.6 to kimi-coding, kimi-coding-cn, and moonshot providers (#13152)

Add kimi-k2.6 as the top model in kimi-coding, kimi-coding-cn, and
moonshot static provider lists (models.py, setup.py, main.py).
kimi-k2.5 retained alongside it.

hermes_cli/models.py

@@ -171,6 +171,7 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "openai/gpt-oss-120b",
     ],
     "kimi-coding": [
+        "kimi-k2.6",
         "kimi-k2.5",
         "kimi-for-coding",
         "kimi-k2-thinking",
@@ -179,12 +180,14 @@ _PROVIDER_MODELS: dict[str, list[str]] = {
         "kimi-k2-0905-preview",
     ],
     "kimi-coding-cn": [
+        "kimi-k2.6",
         "kimi-k2.5",
         "kimi-k2-thinking",
         "kimi-k2-turbo-preview",
         "kimi-k2-0905-preview",
     ],
     "moonshot": [
+        "kimi-k2.6",
         "kimi-k2.5",
         "kimi-k2-thinking",
         "kimi-k2-turbo-preview",