docs: added quickstart guide for S3-Keploy

[kpriyanshu2003]

What has changed?

1. Ran npx prettier --write '**/*.{js,md}' for formatting
2. Added docs in quick-start guide for S3-Keploy was missing.

This PR Resolves #2165

Type of change

Please delete options that are not relevant.

• Documentation update (if none of the other choices apply).

How Has This Been Tested?

Yes, I have tested for the changes

• npm run build was successful
• Changes are visible as per expectations on the local build

Before:

After:

Checklist:

• My code follows the style guidelines of this project.
• I have performed a self-review of my own code.

[github-actions]

Thank you and congratulations 🎉 for opening your very first pull request in keploy

[Copilot]

Pull Request Overview

This PR adds documentation for the new S3-Keploy quickstart sample and updates the site configuration accordingly.

• Included the S3-Keploy sample in the versioned sidebar
• Added a new MDX quickstart guide for Go Fiber + AWS S3 integration
• Cleaned up formatting and style in STYLE.md and README.md

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
versioned_sidebars/version-3.0.0-sidebars.json	Added "quickstart/samples-s3-keploy" to sidebar list
versioned_docs/version-3.0.0/quickstart/samples-go-fiber-s3.md	New tutorial page for the Fiber + S3 sample
STYLE.md	Minor formatting and list-style corrections
README.md	Removed an extraneous blank line

Comments suppressed due to low confidence (2)

versioned_docs/version-3.0.0/quickstart/samples-go-fiber-s3.md:14

• The frontmatter key keyword should be keywords to match other docs and ensure proper indexing.

keyword:

versioned_docs/version-3.0.0/quickstart/samples-go-fiber-s3.md:24

• [nitpick] Consider toning down informal language and emojis in the introduction to maintain a professional and consistent documentation style.

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