adding TextMessage Dependency

[swapnilxi]

What is the doc issue?

Describe the issue
Text Message dependency is missing, in custom agents Custom Agents
What do you want to see in the doc?
add from autogen_agentchat.messages import TextMessage
Screenshots
If applicable, add screenshots to help explain your problem.

Additional context
Add any other context about the problem here.

Link to the doc page, if applicable

https://microsoft.github.io/autogen/stable/user-guide/agentchat-user-guide/custom-agents.html

[JaneIllario]

I opened a PR with the documentation fix for this issue:

#7676

Summary of fix:

• Added the missing TextMessage import in the ArithmeticAgent example in the Custom Agents docs.
• This makes the snippet self-consistent and runnable when copied.

Please let me know if you want me to adjust anything in the PR description or scope.

[Xsidz]

Working on this in PR #8067.

[LeonxLJX]

I'd like to take this one (adding TextMessage Dependency). I'll dig into the root cause and follow up with a PR shortly. (claiming via LeonxLJX)

[LeonxLJX]

I'd like to take this one (adding TextMessage Dependency). I'll look into the root cause and follow up with a PR. (claiming via LeonxLJX)