feat: support gpt-4o-mini for openrouter provider (#6447)

api/core/model_runtime/model_providers/openrouter/llm/_position.yaml

@@ -1,4 +1,5 @@
 - openai/gpt-4o
+- openai/gpt-4o-mini
 - openai/gpt-4
 - openai/gpt-4-32k
 - openai/gpt-3.5-turbo

api/core/model_runtime/model_providers/openrouter/llm/gpt-4o-mini.yaml

@@ -0,0 +1,43 @@
+model: openai/gpt-4o-mini
+label:
+  en_US: gpt-4o-mini
+model_type: llm
+features:
+  - multi-tool-call
+  - agent-thought
+  - stream-tool-call
+  - vision
+model_properties:
+  mode: chat
+  context_size: 128000
+parameter_rules:
+  - name: temperature
+    use_template: temperature
+  - name: top_p
+    use_template: top_p
+  - name: presence_penalty
+    use_template: presence_penalty
+  - name: frequency_penalty
+    use_template: frequency_penalty
+  - name: max_tokens
+    use_template: max_tokens
+    default: 512
+    min: 1
+    max: 4096
+  - name: response_format
+    label:
+      zh_Hans: 回复格式
+      en_US: response_format
+    type: string
+    help:
+      zh_Hans: 指定模型必须输出的格式
+      en_US: specifying the format that the model must output
+    required: false
+    options:
+      - text
+      - json_object
+pricing:
+  input: "0.15"
+  output: "0.60"
+  unit: "0.000001"
+  currency: USD