Fix #802: Add google-cloud-storage and gcsfs to dependencies

[Aaryan-549]

Resolves #802

Description

This PR fixes missing dependencies that caused ImportError when running example scripts in OSS environment.

Issues Fixed:

1. ImportError: cannot import name 'storage' from 'google.cloud' at train_deepscaler_nb.py:151
2. ModuleNotFoundError: No module named 'gcsfs' at train_deepscaler_nb.py:234

Changes:

• Added google-cloud-storage to dependencies (required for GCS file operations in OSS environment)
• Added gcsfs to dependencies (required for accessing gs:// URIs via fsspec)

Both dependencies are used by example notebooks (train_deepscaler_nb.py, math_eval_nb.py) to access Google Cloud Storage buckets for data and models.

Reference

• Issue: [Bug] Fail to run train_deepscaler_nb.py #802
• Affected files: examples/deepscaler/train_deepscaler_nb.py, examples/deepscaler/math_eval_nb.py

Colab Notebook
N/A - This is a dependency fix, not a new API addition.

Checklist

• I have added all the necessary unit tests for my change.
• I have verified that my change does not break existing code and all unit tests pass.
• I have added all appropriate doc-strings/documentation.
• My PR is based on the latest changes of the main branch (if unsure, rebase the code).
• [x ] I have signed the Contributor License Agreement.
• I have followed Contribution Guidelines.