Update repo readme with additional details and few edits

[SwarnaBharathiMantena]

Update is done to improve the quality and clarity of the Cluster Toolkit readme.

Submission Checklist

NOTE: Community submissions can take up to 2 weeks to be reviewed.

Please take the following actions before submitting this pull request.

• Fork your PR branch from the Toolkit "develop" branch (not main)
• Test all changes with pre-commit in a local branch #
• Confirm that "make tests" passes all tests
• Add or modify unit tests to cover code changes
• Ensure that unit test coverage remains above 80%
• Update all applicable documentation
• Follow Cluster Toolkit Contribution guidelines #

[gemini-code-assist]

Summary of Changes

Hello @SwarnaBharathiMantena, 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 focuses on a comprehensive overhaul of the README.md file for the Cluster Toolkit. The primary goal is to enhance the user experience by providing clearer, more detailed, and up-to-date information. This includes refining product descriptions, streamlining setup instructions, and offering more robust troubleshooting guidance, all while ensuring consistent terminology across the document.

Highlights

• Documentation Clarity and Detail: The README.md has been significantly updated to improve the clarity, quality, and detail of the Cluster Toolkit documentation, making it easier for users to understand and utilize the toolkit.
• Terminology Updates: Key terminology has been updated throughout the document, including changing 'Cloud HPC Toolkit' to 'Cluster Toolkit', 'AI/ML' to 'AI, ML', and 'GCP' to 'Google Cloud' for consistency and current branding.
• Enhanced Instructions and Explanations: Several sections now feature more detailed explanations and step-by-step instructions, such as generating cloud credentials, troubleshooting Terraform deployments, and understanding VPC network destruction failures.
• Improved Readability: The document now uses more descriptive language, bullet points, and numbered lists to enhance readability and guide users through various processes, from quickstarts to development setup.
• Updated Links and References: Links to external documentation and internal sections have been reviewed and updated to ensure accuracy and provide relevant additional information.

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[gemini-code-assist]

Code Review

This pull request updates the README.md file to improve clarity and provide additional details. The changes are generally good, but there are a few minor grammatical errors and areas where the phrasing could be improved for better readability. I've provided suggestions to address these points.

[samskillman]

LGTM!