docs: core philosophy

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Change

This pull request represents the first edition of "QA Architecture Handbook" - a comprehensive guide that provides a structured framework and practical advice for building a rock solid, end-to-end QA architecture within an organization.

Highlights

• outlines four key pillars of a solid QA architecture:
  • Culture Foundation
  • Core Infrastructure
  • Automations
  • Exploratory and Manual Testing
• emphasizes the importance of cultivating a quality-first culture where everyone is responsible for quality
• provides detailed sections for each pillar, offering practical advice and best practices

Changes

• added README.md with an overview of the handbook, core philosophy, four pillars, and sections
• created CONTRIBUTION.md with contribution and style guidelines for the handbook
• added detailed markdown files for each section
• added authors
• added precommit lints and postmerge workflows