fix: add missing requirements.txt for smart_coding example

[31groot]

What type of PR is this?
/kind documentation

What this PR does / why we need it:
smart_coding example (both comment and issue sub-examples) had no
requirements.txt. Contributors hit ModuleNotFoundError for numpy,
tqdm, openai, and transformers with no guidance on what to install.

Dependencies identified from imports in:

• comment/testalgorithms/gen/basemodel.py
• issue/testalgorithms/gen/basemodel.py

Which issue(s) this PR fixes:
Fixes #563

[kubeedge-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: 31groot
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[gemini-code-assist]

Code Review

This pull request introduces a requirements.txt file for the smart_coding example, defining its Python dependencies. Feedback is provided to increase the minimum version of transformers to at least 4.37.0 to support Qwen2 architectures and to add accelerate to the requirements, as it is required for automatic device mapping.

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[31groot]

/assign @jaypume