Composio: add new example

[Karthikeya-Meesala]

Why are these changes needed?

Our blog post shows how Autogen Agents can automate tasks with Linear and GitHub using Composio.dev. We believe this workflow could help others, adding it to Autogen's gallery would inspire the community.

[Karthikeya-Meesala]

@Karthikeya-Meesala please read the following Contributor License Agreement(CLA). If you agree with the CLA, please reply with the following information.

@microsoft-github-policy-service agree [company="{your company}"]

Options:

• (default - no company specified) I have sole ownership of intellectual property rights to my Submissions and I am not making Submissions in the course of work for my employer.

@microsoft-github-policy-service agree

• (when company given) I am making Submissions in the course of work for my employer (or my employer has intellectual property rights in my Submissions by contract or applicable law). I have permission from my employer to make Submissions and enter into this Agreement on behalf of my employer. By signing below, the defined term “You” includes me and my employer.

@microsoft-github-policy-service agree company="Microsoft"

Contributor License Agreement

@microsoft-github-policy-service agree company="Composio"

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 37.94%. Comparing base (2053dd9) to head (a8b3d18).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2237   +/-   ##
=======================================
  Coverage   37.94%   37.94%           
=======================================
  Files          77       77           
  Lines        7784     7784           
  Branches     1667     1667           
=======================================
  Hits         2954     2954           
  Misses       4580     4580           
  Partials      250      250           

Flag	Coverage Δ
unittests	37.93% <ø> (ø)

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