新增流式输出的例子，使用fast api和sse，将大模型的输出实时推送到客户端（浏览器）

[yingfeng2016]

Features
新增流式输出的例子，使用fast api和sse，将大模型的输出实时推送到客户端（浏览器）

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[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 62.34%. Comparing base (5446c7e) to head (f7cdf12).
Report is 1965 commits behind head on main.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1434   +/-   ##
=======================================
  Coverage   62.34%   62.34%           
=======================================
  Files         283      283           
  Lines       17371    17371           
=======================================
  Hits        10830    10830           
  Misses       6541     6541           

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[shenchucheng]

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[shenchucheng]

应该作为可选依赖，而不是metagpt的依赖

[geekan]

On the one hand, example is not suitable for affecting requirements; on the other hand, it may be necessary to minimize the difference from other examples.