chore: 更改 provider.json 格式

templates/metadata/llm-models.json

@@ -2,7 +2,7 @@
     "list": [
         {
             "name": "default",
-            "requester": "openai-chat-completion",
+            "requester": "openai-chat-completions",
             "token_mgr": "openai",
             "tool_call_supported": false
         },

templates/provider.json

@@ -1,15 +1,18 @@
 {
     "enable-chat": true,
-    "openai-config": {
-        "api-keys": [
+    "keys": {
+        "openai": [
             "sk-1234567890"
-        ],
-        "base_url": "https://api.openai.com/v1",
-        "chat-completions-params": {
-            "model": "gpt-3.5-turbo"
-        },
-        "request-timeout": 120
+        ]
     },
+    "requester": {
+        "openai-chat-completions": {
+            "base-url": "https://api.openai.com/v1",
+            "args": {},
+            "timeout": 120
+        }
+    },
+    "model": "gpt-3.5-turbo",
     "prompt-mode": "normal",
     "prompt": {
         "default": ""