chore: Add README for running zonal buckets samples

[chandra-siri]

chore: Add README for running zonal buckets samples

[gemini-code-assist]

Summary of Changes

Hello @chandra-siri, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly enhances the documentation for Google Cloud Storage samples by integrating instructions for Zonal Buckets. It introduces a dedicated README for these specific snippets, making it much clearer for users to set up and execute various GCS operations related to zonal buckets, thereby improving discoverability and usability of these features.

Highlights

• Updated main samples README: The samples/README.md file has been updated to include a new section specifically for running Zonal Buckets samples, detailing the necessary pip install command and an example usage.
• New Zonal Buckets README: A new README.md file has been added within the samples/snippets/zonal_buckets/ directory. This file provides comprehensive documentation for interacting with Google Cloud Storage zonal buckets, including prerequisites and detailed instructions for various operations like creating, finalizing, reading, pausing, resuming, and tailing appendable objects.

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[gemini-code-assist]

Code Review

This pull request adds new README files to document how to run the zonal buckets samples. The main samples/README.md has been updated to include instructions for setting up and running these new samples, and a dedicated samples/snippets/zonal_buckets/README.md has been added with detailed usage for each snippet. This is a valuable improvement for user guidance.

[gemini-code-assist]

The instruction pip install -e ".[grpc]" installs the google-cloud-storage package in editable mode. For users who only intend to run the samples, a non-editable installation is generally more appropriate. Removing the -e flag would install the package from the local source in a standard way, ensuring gRPC dependencies are available without setting up a development environment.

Suggested change

	pip install -e ".[grpc]"
	pip install ".[grpc]"