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

[riverma]

Checked for duplicates

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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