Add updated environment setup instructions for Raspberry Pi OS Bookworm compatibility

[dhrubasaha08]

Add updated environment setup instructions for Raspberry Pi OS Bookworm compatibility across 7 Raspberry Pi examples

This commit introduces a new 'Setup Environment' section in the README files of seven Raspberry Pi TensorFlow Lite examples to ensure compatibility with the Debian Bookworm (2024 release). These updates include detailed steps for installing Python 3.9, managing dependencies, and setting up a virtual environment, which are essential for addressing the specific needs of the latest Raspberry Pi OS version.

Additionally, the necessity of using a virtual environment is highlighted due to the error encountered when attempting to run setup.sh without it on this new OS version:

error: externally-managed-environment

This error emphasizes the importance of isolating Python environments to prevent conflicts with system-managed packages and maintain stability across different development scenarios.

Moreover, I encountered issues related to the specific Python version used by the bullseye version of the Raspberry Pi OS , which necessitates this setup to ensure compatibility and address any potential GLIBCXX version errors when executing Python scripts:

ImportError: /lib/arm-linux-gnueabihf/libstdc++.so.6: version `GLIBCXX_3.4.29' not found ...

By implementing these changes, I aim to provide a smooth setup experience for users working with Raspberry Pi TensorFlow Lite examples, ensuring that they can focus on development without being hindered by environmental issues.

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