Add comprehensive documentation for watch movement bridges and mechanical components

[Copilot]

This PR adds a new comprehensive guide about watch movement bridges to expand the Dev-Journal beyond software engineering topics. The new documentation addresses mechanical watchmaking concepts and follows the established format of the repository.

What's Added

New Documentation File: watch-movement-bridges.md

• Definition and Purpose: Explains what bridges are in mechanical watch movements and their core functions
• Types of Bridges: Covers train wheel bridge, barrel bridge, balance bridge, pallet bridge, and winding bridge
• Key Components: Detailed overview of other important watch movement parts including mainspring, escapement, balance wheel, gear train, jewels, and more
• Omega Co-Axial Differences: Specific section explaining how Omega's Co-Axial movement bridges differ from traditional designs
• Technical Details: Information about bridge finishing, decoration, and modern manufacturing techniques

Updated Repository Structure

• Added new "Mechanical Engineering & Horology" section to README.md
• Updated repository description to reflect expanded scope beyond software engineering
• Maintained consistent documentation format with existing files

The documentation provides clear, educational content about mechanical timepieces while following the same structure and style as other topics in the journal. It serves as a comprehensive reference for understanding the intricate engineering behind mechanical watch movements.

Fixes #72.

---

💡 You can make Copilot smarter by setting up custom instructions, customizing its development environment and configuring Model Context Protocol (MCP) servers. Learn more Copilot coding agent tips in the docs.