feat: expand upon the 7 key principles of DevOps

[BenGWeeks]

This PR expands upon the 7 key principles of DevOps in the T-Minus-15 book.

Changes

• Fixed duplicate principle Fixing Amazon typo #7 (changed from "Embrace failure and learn" to "Ensure continuous monitoring and measurement")
• Added comprehensive explanations for each of the 7 DevOps principles
• Enhanced content with practical context and real-world applications
• Maintained existing structure while significantly expanding educational value

Resolves #19

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PR Review: Expanding DevOps Principles ✅

Todo List:

• Read and analyze the modified file
• Review AsciiDoc formatting and syntax
• Assess content quality and educational value
• Check for consistency with existing content structure
• Provide comprehensive review feedback

Review Summary

This PR significantly enhances the educational value of the DevOps principles section. The changes are well-structured and provide comprehensive explanations that transform a simple list into meaningful learning content.

✅ Strengths

Content Quality:

• Excellent educational value: Each principle now has a detailed, practical explanation that helps readers understand both the "what" and "why"
• Real-world context: The explanations connect abstract principles to practical implementation scenarios
• Comprehensive coverage: All 7 principles are thoroughly explained with consistent depth

Structure & Formatting:

• Consistent AsciiDoc syntax: Proper use of ==== heading levels for each principle section
• Clear hierarchy: Maintains the existing document structure while adding valuable detail
• Good readability: Well-organized with logical flow from principle to explanation

Technical Improvements:

• Fixed duplicate issue: Correctly changed principle Fixing Amazon typo #7 from duplicate "Embrace failure and learn" to "Ensure continuous monitoring and measurement"
• Maintained references: Preserved the existing footnote reference to the source material

🔧 Minor Suggestions for Enhancement

Content Readability:

• Consider breaking up dense paragraphs: Some explanations (particularly principles 1, 2, and 7) are quite text-heavy. Consider adding bullet points for key concepts or splitting into shorter paragraphs
• Add specific examples: Where appropriate, concrete examples could make abstract concepts more tangible (e.g., specific automation tools, monitoring metrics)

Formatting Enhancements:

// Example of how principle 4 could be enhanced:
==== 4. Automate (almost) everything

Automation is the engine that makes DevOps scalable and reliable. This principle involves automating repetitive tasks such as:

* Testing and quality assurance
* Building and packaging applications  
* Deploying to various environments
* Monitoring and alerting
* Infrastructure provisioning

The goal is to reduce manual errors, increase consistency, and free up human resources for higher-value activities...

📋 Technical Review

AsciiDoc Syntax: ✅ All formatting is correct and consistent
Content Structure: ✅ Maintains existing document hierarchy
Link Integrity: ✅ Preserves existing footnotes and references
Consistency: ✅ Writing style matches existing content tone

🎯 Overall Assessment

This is a high-quality enhancement that significantly improves the book's educational value. The content is well-researched, clearly written, and provides practical insights that will benefit readers. The fix for the duplicate principle also resolves an important content accuracy issue.

Recommendation: ✅ Approve - The changes are ready to merge. The minor suggestions above are optional enhancements that could be addressed in future updates if desired.

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