[Improve Existing Best Practice Guide]: Update Quick Start sections to reference slim-cli with new alias-based commands

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Best Practice Guide Category

All

Best practice guide URL

Multiple guides need updating, including:

• https://nasa-ammos.github.io/slim/docs/guides/documentation/readme/
• https://nasa-ammos.github.io/slim/docs/guides/governance/
• All guides with Quick Start sections that reference manual implementation

Describe the improvement

With the recent migration of slim-cli from SLIM-X.X numeric IDs to descriptive aliases (resolved in slim-cli issue #17), we need to update the Quick Start sections across all relevant best practice guides to reference the new alias-based slim-cli commands.

Current Problem:

• Many guides show manual implementation steps in their Quick Start sections
• Users have to manually download templates, copy files, and follow multi-step processes
• The improved slim-cli automation with aliases like readme, governance-small, secrets-github is not being promoted

Proposed Improvements:

1. Add slim-cli Quick Start sections to all applicable guides that include a template or automation option
2. Update existing Quick Start sections to prominently feature slim-cli commands using the new alias format
3. Include both manual and automated options with slim-cli being the recommended approach

Example of improved Quick Start section:

## Quick Start

### 🚀 Automated with slim-cli (Recommended)
```bash
# Apply the README template using slim-cli
slim apply --best-practices readme --repo-dir /path/to/your/repo

# Or apply to a remote repository
slim apply --best-practices readme --repo-urls https://github.com/your-org/your-repo

### 📋 Manual Implementation
⬇️ [Link to README Template](template-link)

Download the guide above and place in the root folder of your repository...

Guides that need updating:

• All documentation guides (README, changelog, etc.)
• Governance guides (governance-small, governance-medium, governance-large)
• Security guides (secrets detection, etc.)
• Any guide with downloadable templates or starter kits

Start by reviewing the README and governance guide URLs, then inventory other guides with Quick Start sections, downloadable templates, or starter kits. Compare their manual steps with the documented slim-cli aliases such as readme and governance-small. Done means every applicable guide clearly presents automated and manual options with current commands.