feat: add deep think feature (#311)

* feat: implement backend logic

* feat: implement api/config endpoint

* rename the symbol

* feat: re-implement configuration at client-side

* feat: add client-side of deep thinking

* fix backend bug

* feat: add reasoning block

* docs: update readme

* fix: translate into English

* fix: change icon to lightbulb

* feat: ignore more bad cases

* feat: adjust thinking layout, and implement auto scrolling

* docs: add comments

---------

Co-authored-by: Henry Li <henry1943@163.com>

conf.yaml.example

@@ -1,9 +1,20 @@
 # [!NOTE]
-# Read the `docs/configuration_guide.md` carefully, and update the configurations to match your specific settings and requirements.
-# - Replace `api_key` with your own credentials
-# - Replace `base_url` and `model` name if you want to use a custom model
+# Read the `docs/configuration_guide.md` carefully, and update the
+# configurations to match your specific settings and requirements.
+# - Replace `api_key` with your own credentials.
+# - Replace `base_url` and `model` name if you want to use a custom model.
+# - A restart is required every time you change the `config.yaml` file.
 
 BASIC_MODEL:
   base_url: https://ark.cn-beijing.volces.com/api/v3
   model: "doubao-1-5-pro-32k-250115"
   api_key: xxxx
+
+# Reasoning model is optional.
+# Uncomment the following settings if you want to use reasoning model
+# for planning.
+
+# REASONING_MODEL:
+#   base_url: https://ark-cn-beijing.bytedance.net/api/v3
+#   model: "doubao-1-5-thinking-pro-m-250428"
+#   api_key: xxxx