add support for cohere (#1849)

### What problem does this PR solve?

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

Co-authored-by: Zhedong Cen <cenzhedong2@126.com>

web/src/assets/svg/llm/cohere.svg

@@ -0,0 +1 @@
+<svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" xml:space="preserve" style="enable-background:new 0 0 75 75" viewBox="0 0 75 75" width="75"  height="75" ><path d="M24.3 44.7c2 0 6-.1 11.6-2.4 6.5-2.7 19.3-7.5 28.6-12.5 6.5-3.5 9.3-8.1 9.3-14.3C73.8 7 66.9 0 58.3 0h-36C10 0 0 10 0 22.3s9.4 22.4 24.3 22.4z" style="fill-rule:evenodd;clip-rule:evenodd;fill:#39594d"/><path d="M30.4 60c0-6 3.6-11.5 9.2-13.8l11.3-4.7C62.4 36.8 75 45.2 75 57.6 75 67.2 67.2 75 57.6 75H45.3c-8.2 0-14.9-6.7-14.9-15z" style="fill-rule:evenodd;clip-rule:evenodd;fill:#d18ee2"/><path d="M12.9 47.6C5.8 47.6 0 53.4 0 60.5v1.7C0 69.2 5.8 75 12.9 75c7.1 0 12.9-5.8 12.9-12.9v-1.7c-.1-7-5.8-12.8-12.9-12.8z" style="fill:#ff7759"/></svg>

web/src/pages/user-setting/setting-model/constant.ts

@@ -22,7 +22,8 @@ export const IconMap = {
   StepFun: 'stepfun',
   NVIDIA:'nvidia',
   'LM-Studio':'lm-studio',
-  'OpenAI-API-Compatible':'openai-api'
+  'OpenAI-API-Compatible':'openai-api',
+  'cohere':'cohere'
 };
 
 export const BedrockRegionList = [